Sites
Filter sites by: (add a filter)
Doors Open Ontario presenting sponsor
Doors Open Ontario presenting sponsor

R.C. Harris Water Treatment Plant Doors Open Toronto

R.C. Harris Water Treatment Plant

Constructed in the 1930s, this popular Doors Open site is Toronto’s largest water treatment plant, providing 400 million litres of safe drinking water daily. It’s also the largest ensemble of art deco structures in the city. Take a self-guided tour and explore the pump house and filter building, with staff available to answer questions along the way. (No tripods/filming allowed.) (Photo: Samuel Kolber)

  • Partial wheelchair access
  • Self-guided tours available
  • Site is protected by the Ontario Heritage Trust
  • Washrooms
  • Photography allowed

Architecture

Year built: 1932
Building type: Historical landmark

Dates/hours open

May 23, 10:00am - May 24, 04:00pm

Ravine Vineyard Estate Winery Doors Open Niagara-on-the-Lake

Ravine Vineyard Estate Winery

The Ravine Vineyard Estate Winery is a timeless Niagara destination for award-winning wines and world-class farm-to-table cuisine. It is steeped in history, family legacy and agricultural heritage. Situated in the heart of St. Davids, this charming and historical property offers a unique escape from the everyday hustle and bustle while being conveniently located only minutes from the Queen Elizabeth Way.

  • Adaptive reuse
  • Food vendors
  • Guided tours available
  • Kid-friendly
  • Parking
  • Washrooms
  • Photography allowed

Contact info

1366 York Road
St. Davids, Ontario
Email: info@ravinevineyard.com
https://www.ravinevineyard.com

Architecture

Year built: 1867
Building type: Attraction Commercial Food and drink

Dates/hours open

Oct 17, 11:00am - Oct 17, 08:00pm

Raw Signal Group Headquarters Doors Open Toronto

New

Raw Signal Group Headquarters

This former Imperial Bank of Canada branch has stood for over 100 years; it was one of Toronto’s oldest remaining bank buildings. Today, it is being painstakingly restored as the headquarters for the management training firm Raw Signal Group. During Doors Open, the main-floor banking hall will be open, showing the original terrazzo flooring and the still-operating 1960s bank vault.

  • Adaptive reuse
  • Partial wheelchair access
  • Self-guided tours available
  • Washrooms
  • Photography allowed

Contact info

1414 Danforth Avenue
Toronto, Ontario

Architecture

Year built: 1919
Building type: Commercial
Architect: Langley & Howland

Dates/hours open

May 23, 10:00am - May 24, 05:00pm

RCLUB Motoring Club Doors Open Toronto

RCLUB Motoring Club

RCLUB is reinventing the car club. Located in midtown Toronto, this clubhouse is more than just a social club. Members visit to catch up with friends, connect with clients, work on or wash their cars, or hit the virtual track on top-notch driving simulators. While the love of cars is shared, the incredible community is what makes RCLUB special.

  • Guided tours available
  • Partial wheelchair access
  • Washrooms
  • Photography allowed
  • Rental opportunities

Contact info

25 Commercial Road
Toronto, Ontario
https://rclub.co

Architecture

Year built: 2019

Architect: Neal Prabhu

Dates/hours open

May 23, 10:00am - May 24, 05:00pm

Redpath Sugar Doors Open Toronto

Redpath Sugar

Redpath Sugar began in Canada in 1854 and has been operating in Toronto since 1959. As one of the last industrial establishments in the Toronto Harbour, Redpath remains a vital part of the community. Explore the site, engage with employees, interact with historical artifacts and enjoy a treat or two along the way. Entrance will be through the Centre Gate.

  • Full wheelchair access
  • Guided tours available
  • Kid-friendly
  • Washrooms
  • Photography allowed

Contact info

95 Queen's Quay East
Toronto, Ontario
https://www.redpathsugar.com

Architecture

Year built: 1959
Building type: Commercial Museum

Dates/hours open

May 23, 10:00am - May 24, 05:00pm

Regent Theatre: Ontario Tech University Doors Open Oshawa

Regent Theatre: Ontario Tech University

The Regent Theatre was constructed in 1919, and its King Street façade features symmetrical Georgian architectural lines. It stands as one of the few remaining examples of this classically inspired architectural style in Oshawa. Originally built for Famous Players theatres, it was closed for several years before being reopened in 2010 as a lecture theatre for Ontario Tech University.

  • Adaptive reuse
  • Full wheelchair access
  • Parking
  • Self-guided tours available
  • Site is protected by the Ontario Heritage Trust
  • Washrooms
  • Photography allowed

Contact info

50 King Street East
Oshawa, Ontario
Email: gm@regenttheatre.ca
http://regenttheatre.ca

Architecture

Year built: 1919; designated in 2001
Building type: Attraction Concert hall Educational facility Theatre
Architect: John McNee Jeffrey

Dates/hours open

May 02, 10:00am - May 02, 03:00pm

Regis College Doors Open Toronto

New

Regis College

Join us to experience a site where architecture, history and international perspectives unite to form a true community gathering space. Regis College (which comprises Christie Mansion and Fontbonne Hall) is part of the University of Toronto’s Faculty of Theology. During Doors Open, explore the ornate and well-preserved Victorian architecture, as well as speak with staff and watch a multimedia presentation.

  • Partial wheelchair access
  • Self-guided tours available
  • Washrooms
  • Photography allowed

Contact info

100 Wellesley Street West
Toronto, Ontario

Architecture

Year built: 1880 (Christie Mansion) with later additions in 1910; 1954 (Fontbonne Hall); 2009 (connecting atrium)
Building type: Educational facility Historical house
Architect: Gordon and Helliwell (Christie Mansion); later additions by Darling and Pearson; Larkin Architect Limited (connecting atrium)

Dates/hours open

May 23, 10:00am - May 24, 05:00pm

Restoration Design Inc. Doors Open Guelph

New

Restoration Design Inc.

Restoration Design Inc. is a manufacturing facility specializing in rust repair and replacement panels for vintage Porche automobiles.  The company produces many of its parts in-house and also supplies used original panels and other components for restoration projects. Visitors will learn about the specialized tools, machines and processes involved.

  • Guided tours available
  • Parking
  • Washrooms
  • Photography allowed

Contact info

24 Hayes Avenue
Guelph, Ontario

Architecture

Building type: Commercial

Dates/hours open

Apr 25, 10:00am - Apr 25, 04:00pm

Rhythm Automotive Canada Doors Open St. Catharines

New

Rhythm 2 2026

Rhythm Automotive Canada

We are pleased to welcome visitors to Rhythm Automotive Canada to explore the history of its facilities. Tours begin in Plant #2 (1954), featuring machining of in-house forged components, then continue through an underground tunnel beneath Louth Street to Plant #1, ‘The Forge’ (1929), where steering linkages and ball joints are produced for international clients.

  • Full wheelchair access
  • Guided tours available
  • Parking

Contact info

230 Louth Street
St. Catharines, Ontario
https://www.thk.com/

Architecture

Year built: 1929
Building type: Factory

Dates/hours open

Jun 13, 10:00am - Jun 13, 04:00pm

Richard Vanderburgh House (Richmond Hill Board of Trade) Doors Open Richmond Hill

Richard Vanderburgh House (Richmond Hill Board of Trade)

In 1805, the original property was sold to Captain Fulton (Loyalist and first justice of the peace in the area). Richard Vanderburgh later purchased the property and built the Georgian-style house while married to Fulton’s daughter, Elizabeth. Now home to the Richmond Hill Board of Trade, it fosters local business growth. Guided tours highlight its architecture, exhibits, and the heritage garden.

  • Adaptive reuse
  • Guided tours available
  • Kid-friendly
  • Parking
  • Site is protected by the Ontario Heritage Trust
  • Washrooms
  • Photography allowed

Contact info

376 Church Street South
Richmond Hill, Ontario
Email: heritageservices@richmondhill.com
https://www.rhbot.ca

Architecture

Year built: 1833; relocated here in 1987
Building type: Commercial Historical house
Architect: Jan H. Ravens

Dates/hours open

May 09, 10:00am - May 09, 04:00pm

Richland Academy (Josephine Sherman Gallery) Doors Open Richmond Hill

Richland Academy (Josephine Sherman Gallery)

The Richland Academy is displaying artwork from award-winning artist and art teacher Josephine Sherman. Guests are invited to explore watercolour paintings that portray the beauty of our landscapes, wilderness and evocative florals with an emphasis on the interplay of light and colour.

    • Full wheelchair access
    • Kid-friendly
    • Parking
    • Self-guided tours available
    • Washrooms
    • Photography allowed

    Contact info

    11570 Yonge Street
    Richmond Hill, Ontario
    Email: culture@richmondhill.ca
    https://richlandacademy.ca

    Architecture

    Building type: Commercial Educational facility Gallery

    Dates/hours open

    May 09, 10:00am - May 09, 04:00pm

    Richmond Hill Artifact Collections (Operations Centre) Doors Open Richmond Hill

    Richmond Hill Artifact Collections (Operations Centre)

    The Richmond Hill Artifact Collections Storage Centre houses thousands of historical artifacts in its climate-controlled facility. Much of the collection — generously donated by local families — dates back over a century. Take a behind-the-scenes look at the collections and learn how they catalogue, preserve and maintain the artifacts.

    • Full wheelchair access
    • Guided tours available
    • Kid-friendly
    • Parking
    • Washrooms
    • Photography allowed

    Contact info

    1200 Elgin Mills Road East
    Richmond Hill, Ontario
    https://www.richmondhill.ca/en/things-to-do/artifact-collections.aspx

    Architecture

    Year built: 1990
    Building type: Government building Archives

    Dates/hours open

    May 09, 10:00am - May 09, 04:00pm

    Richmond Hill Cultural Centre Doors Open Richmond Hill

    New

    Richmond Hill Cultural Centre

    Built in 1936 as a post office, this historical gem has been reimagined into a dynamic cultural centre. It offers rentable rooms for artists, cultural organizations and creative professionals. From hands-on studios to soundproof recording rooms and flexible gathering spaces, it is built to support your creative journey. Whether you are looking to create or collaborate, you will find your spark here.

    • Adaptive reuse
    • Guided tours available
    • Kid-friendly
    • Partial wheelchair access
    • Washrooms
    • Photography allowed
    • Rental opportunities

    Contact info

    10184 Yonge Street
    Richmond Hill, Ontario
    Email: culture@richmondhill.ca
    https://www.richmondhill.ca/cultural-centre

    Architecture

    Year built: 1936
    Building type: Attraction Post office Gallery Studio

    Dates/hours open

    May 09, 10:00am - May 09, 04:00pm

    Richmond Hill David Dunlap Observatory Doors Open Richmond Hill

    Richmond Hill David Dunlap Observatory

    The Richmond Hill David Dunlap Observatory is a national historic site. Opened in 1935, it was at the forefront of Canadian astronomical research, housing the then-largest telescope in Canada. Today, it is a facility for public education and outreach through City-run programs and partnerships. Pre‑registration is required for tours and activities.

      • Guided tours available
      • Kid-friendly
      • National Historic Site (Canada)
      • Parking
      • Site is protected by the Ontario Heritage Trust
      • Washrooms
      • Photography allowed
      • Rental opportunities

      Contact info

      123 Hillsview Drive
      Richmond Hill, Ontario
      Email: heritageservices@richmondhill.ca
      https://www.richmondhill.ca/ddo

      Architecture

      Year built: 1935
      Building type: Attraction Educational facility Historical landmark
      Architect: Mathers and Haldenby

      Dates/hours open

      May 09, 10:00am - May 09, 04:00pm

      Richmond Hill Heritage Centre Doors Open Richmond Hill

      Richmond Hill Heritage Centre

      The Richmond Hill Heritage Centre is housed in a restored 1840s Regency-style cottage, and was originally home to Amos Wright, the first Reeve of Markham Township. The Centre serves as a unique venue to showcase the rich heritage and history of Richmond Hill. Explore galleries and exhibits, or enjoy their popular afternoon teas (reserve online — limited seating available).

      • Full wheelchair access
      • Kid-friendly
      • Self-guided tours available
      • Site is protected by the Ontario Heritage Trust
      • Washrooms
      • Photography allowed
      • Rental opportunities

      Contact info

      19 Church Street North
      Richmond Hill, Ontario
      Email: heritageservices@richmondhill.ca
      http://richmondhill.ca/heritagecentre

      Architecture

      Year built: 1840
      Building type: Attraction Historical house Museum Gallery

      Dates/hours open

      May 09, 10:00am - May 09, 04:00pm

      Richmond Hill Hindu Temple Doors Open Richmond Hill

      Richmond Hill Hindu Temple

      The Richmond Hill Hindu Temple built by volunteers and devotees. Construction began in 1975 with the installation of a Ganesha and ended in 2001 with the large altar towers. The Temple provides individuals and families with a place to connect to their faith. Tour fine art displays, enjoy cultural programming, and learn about the site’s historical and cultural significance. (No photography allowed).

      • Full wheelchair access
      • Kid-friendly
      • Parking
      • Self-guided tours available
      • Washrooms

      Contact info

      10865 Bayview Avenue
      Richmond Hill, Ontario
      Email: heritageservices@richmondhill.ca
      http://www.rhht.ca

      Architecture

      Year built: 1975
      Building type: Place of worship
      Architect: V. Janakiramana Sthapathi

      Dates/hours open

      May 09, 10:00am - May 09, 04:00pm

      Richmond Hill Lawn Bowling Club Doors Open Richmond Hill

      Richmond Hill Lawn Bowling Club

      Richmond Hill Lawn Bowling Club

      The Richmond Hill Lawn Bowling Club is in the heart of Richmond Hill, welcoming social and competitive bowlers of all ages. It was built in the early 1920s by founding member, William Graham on property he sold to the Club. Recent renovations strengthened the foundation of the building. Tour the facility, try the sport and meet friendly people.

      • Guided tours available
      • Kid-friendly
      • Parking
      • Partial wheelchair access
      • Washrooms
      • Photography allowed
      • Rental opportunities

      Contact info

      43 Church Street South (Elgin Barrow Arena)
      Richmond Hill, Ontario
      Email: heritageservices@richmondhill.ca
      https://www.rhlawnbowling.com

      Architecture

      Year built: 1920
      Building type: Sports facility
      Architect: William H. Graham

      Dates/hours open

      May 09, 10:00am - May 09, 04:00pm

      Richmond Hill Live Steamers Doors Open Whitchurch-Stouffville

      Richmond Hill Live Steamers

      Adults and children alike can visit the Richmond Hill Live Steamers to experience miniature railway demonstrations. This outdoor model railway, run by hobbyists and engineers, features several gauges of trains running on steam, gasoline and electric power, based on real engines dating back to 1803. Rides are limited to one per person. Last admission at 2 p.m.

      • Kid-friendly
      • Self-guided tours available
      • Photography allowed

      Contact info

      15922 McCowan Road
      Stouffville, Ontario
      https://richmond-hill-live-steamers.tripod.com

      Architecture

      Year built: 1977
      Building type: Attraction Transportation

      Dates/hours open

      Jun 06, 10:00am - Jun 06, 02:00pm

      Richmond Hill Presbyterian Church Doors Open Richmond Hill

      Richmond Hill Presbyterian Church

      The Richmond Hill Presbyterian Church features a 200-year-old sanctuary with original pews, flooring, Gothic woodwork, patterned brickwork and stunning stained‑glass windows. Tour the building, explore the cemetery, engage in a demonstration of the 1915 Cassavant pipe organ and experience a diverse array of creative expressions by artists Narenhua, Roger Potts, and Ziba Salehi-Rahni.

      • Full wheelchair access
      • Kid-friendly
      • Parking
      • Self-guided tours available
      • Washrooms
      • Photography allowed
      • Rental opportunities

      Contact info

      10066 Yonge Street
      Richmond Hill, Ontario
      Email: heritageservices@richmondhill.ca
      https://rhpresbyterian.ca

      Architecture

      Year built: 1880
      Building type: Place of worship
      Architect: Langley, Langley & Burke

      Dates/hours open

      May 09, 10:00am - May 09, 04:00pm

      Rideau Hall (Official Residence of the Governor General of Canada) Doors Open Ottawa

      Rideau Hall (Official Residence of the Governor General of Canada)

      Rideau Hall has been the official residence of every Governor General of Canada since 1867, and their workplace since 1940. It has nearly two centuries of history and has become an important gathering place and site of official activities. The grounds, the building and its interiors have evolved over time to reflect/reinforce Rideau Hall’s identity as a national symbol.

      • French services available
      • Full wheelchair access
      • Guided tours available
      • Kid-friendly
      • National Historic Site (Canada)
      • Parking
      • Washrooms
      • Photography allowed

      Contact info

      1 Sussex Drive
      Ottawa, Ontario
      https://www.gg.ca/en/visit-us/rideau-hall

      Architecture

      Year built: 1838
      Building type: Government building Historical landmark Historical house
      Architect: Thomas McKay

      Dates/hours open

      Jun 06, 10:00am - Jun 07, 04:00pm

      Rideau Valley Wildlife Sanctuary Doors Open Ottawa

      Rideau Valley Wildlife Sanctuary

      The Rideau Valley Wildlife Sanctuary is a wildlife rehabilitation centre in the Ottawa area that treats injured and orphaned wild mammals and reptiles. Approximately 1,500 animals are admitted each year. Visitors will receive a tour of the centre and see wildlife being fed and treated behind one-way viewing windows. There will also be several display booths and outdoor activities. Registration required.

      • Adaptive reuse
      • Full wheelchair access
      • Guided tours available
      • Kid-friendly
      • Parking
      • Washrooms

      Contact info


      North Gower, Ottawa, Ontario
      https://www.rideauwildlife.org/

      Architecture


      Dates/hours open

      Jun 06, 11:00am - Jun 07, 04:00pm

      Ridley College Doors Open St. Catharines

      New

      Ridley College

      Visitors are invited to explore the Lower School, sensory gardens, Mandeville Theatre, and the newly renovated Evans Athletic Centre and Iggulden Building. These spaces showcase a blend of historic architecture and modern learning environments, reflecting the school’s heritage and forward-looking approach. Please note: due to a private event, the historic chapel and dining hall are not open for tours.

      • Full wheelchair access
      • Kid-friendly
      • Parking
      • Self-guided tours available

      Contact info

      2 Ridley Road
      St. Catharines, Ontario
      http://ridleycollege.com

      Architecture

      Year built: 1889
      Building type: Educational facility

      Dates/hours open

      Jun 13, 10:00am - Jun 13, 04:00pm

      Rising Moon Bellydance Doors Open London

      Rising Moon Bellydance

      Middle Eastern Dance, also known as Bellydance, is an ancient art form. At Rising Moon Studio you will discover its rich history, styles and evolution. Join us for mesmerizing performances from 3:00 to 4:30pm followed by a Foundations Workshop from 5:00 to 6:00pm. Shimmy, undulate and celebrate 25 years of cultural activities in our city!

      • Full wheelchair access
      • Parking
      • Photography allowed

      Contact info

      1444 Glenora Drive, Unit 2
      London, Ontario
      Email: luna@risingmoonbellydance.com
      https://risingmoonbellydance.com

      Architecture

      Building type: Commercial

      Dates/hours open

      Sep 19, 03:00pm - Sep 19, 06:00pm

      RiverBrink Art Museum Doors Open Niagara-on-the-Lake

      RiverBrink Art Museum

      The RiverBrink Art Museum is a fine-art museum, open since 1983, featuring changing exhibitions from the renowned art collection of lawyer Samuel E. Weir (the museum is his former home), as well as outstanding works on loan from contemporary artists and Canadian and international collections. Exhibitions change throughout the year. There is also a library and gift shop onsite.

      • Adaptive reuse
      • Kid-friendly
      • Parking
      • Partial wheelchair access
      • Self-guided tours available
      • Washrooms
      • Photography allowed
      • Rental opportunities

      Contact info

      116 Queenston Street
      Queenston, Ontario
      Email: manager@riverbrink.org
      https://www.riverbrink.org

      Architecture

      Year built: 1970
      Building type: Museum Gallery
      Architect: Arthur E. Nutter

      Dates/hours open

      Oct 17, 10:00am - Oct 17, 05:00pm