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Doors Open Ontario presenting sponsor
Doors Open Ontario presenting sponsor

Nursing Simulation Centre Doors Open Toronto

Nursing Simulation Centre

The Nursing Simulation Centre allows York University's nursing students to achieve their professional development/learning goals. Located on the third floor of the Health, Nursing and Environmental Studies building, it can be divided into two unique spaces — the Nursing Skills Lab and the Computer Skills Lab. The Nursing Skills Lab houses adult medical-surgical beds, a pediatric area and two isolation rooms.

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

Contact info

104 Scholars Walk
Toronto, Ontario
https://www.yorku.ca/health/nursing/nursing-simulation-centre

Architecture

Year built: 1970s
Building type: Educational facility Health-care facility

Dates/hours open

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

Oak Ridges Home Studio (Helen Grace Agalawatte) Doors Open Richmond Hill

New

Oak Ridges Home Studio (Helen Grace Agalawatte)

This studio features the work of Helen Grace Agalawatte, inspired by journeys north of Toronto and the rugged beauty of Ontario’s lakes, rocks, and forests. Working on cradled wood panels, her layered paintings, created using unconventional tools, capture the wild, unpredictable energy of the landscape. 

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

Contact info

35 Kaitlin Drive
Richmond Hill, Ontario
Email: culture@richmondhill.ca

Architecture

Building type: Private residence Studio

Dates/hours open

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

Oakwood Library Doors Open Kawartha Lakes

New

Oakwood Library

The Oakwood Library was constructed in 1913 as the new school for Mariposa School Section 12. Operating as a school until 1985, it became the Mariposa municipal administration building and then, in 2002, the Oakwood branch of the Kawartha Lakes Public Library. Join us to explore the building and learn about this historical institutional building in the hamlet of Oakwood.

  • Adaptive reuse
  • Kid-friendly
  • Parking
  • Partial wheelchair access
  • Washrooms
  • Photography allowed

Architecture

Year built: 1913
Building type: Library Schoolhouse
Architect: William B. Taylor

Dates/hours open

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

Old City Hall Doors Open Toronto

Old City Hall

The imposing Old City Hall was Toronto’s third city hall. The lobby features one of the city's few secular stained-glass windows. Original gargoyles were replaced in 2002 with replicas. And, in 1925, a cenotaph was erected outside to honour Torontonians who died in the First World War (later updated for veterans of the Second World War and the Korean War).

  • Full wheelchair access
  • Self-guided tours available
  • Site has blue and gold provincial plaque
  • Site is protected by the Ontario Heritage Trust
  • Washrooms
  • Photography allowed
  • Veterans/Military heritage

Contact info

60 Queen Street West
Toronto, Ontario

Architecture

Year built: 1889-99
Building type: Government building Historical landmark
Architect: Edward James Lennox

Dates/hours open

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

Old Don Jail Doors Open Toronto

Old Don Jail

The Old Don Jail served as a prison for 113 years, closing in 1977. After years of stagnation, the property was purchased by Hennick Bridgepoint Hospital as part of its new campus. The modern hospital, with its 150-year history in Toronto's Riverdale community, is connected by a glass bridge to the historical jail, which now serves as its administrative building. (Photo: Richard Adams)

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

Contact info

1 Bridgepoint Drive
Toronto, Ontario

Architecture

Year built: 1864
Building type: Historical landmark
Architect: William Thomas

Dates/hours open

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

Old Fire Hall 30 Doors Open Toronto

New

Old Fire Hall 30

This was a working fire station until 1980. The designated structure has been preserved and moved to Biidaasige Park in 2021 where it reopened in January 2026 as a community building staffed/programmed by the City. During Doors Open, explore the newly renovated building, see original architectural drawings, discover surrounding nature walks, and learn about future developments for the park.

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

Contact info

39 Commissioners Street
Toronto, Ontario

Architecture

Year built: 1922
Building type: Fire station

Dates/hours open

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

ONEC Tennis Pavillion Doors Open Ottawa

New

ONEC Tennis Pavillion

The tennis pavilion at the Ottawa New Edinburgh Club serves as the social and operational hub of the club’s vibrant summer tennis program. Set within a scenic parkland environment near the Ottawa River, the pavilion overlooks a well-maintained collection of outdoor courts and provides a welcoming space for players, members and guests.

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

Contact info

504 Sir George-Etienne Cartier Parkway
Ottawa, Ontario

Architecture

Year built: 1925
Building type: Sports facility

Dates/hours open

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

Ontario Forest Research Institute Doors Open Sault Ste. Marie

Ontario Forest Research Institute

Explore the Ontario Forest Research Institute (OFRI), one of the Sault’s most beautifully designed buildings. Constructed with local maple, granite and glass, it offers a unique work environment with natural light and a reminder of its northern Ontario location. OFRI is a Ministry of Natural Resources workplace, supporting forest research related to climate change, genetic diversity, invasive species and more.

  • Full wheelchair access
  • Guided tours available
  • Parking
  • Washrooms

Contact info

1235 Queen Street East
Sault Ste. Marie, Ontario
https://www.ontario.ca/page/forest-research

Architecture

Year built: 1987
Building type: Government building
Architect: David Ellis

Dates/hours open

Sep 26, 10:00am - Sep 26, 04:00pm

Ontario Heritage Centre Doors Open Toronto

Ontario Heritage Centre

Headquarters of the Ontario Heritage Trust, the building features two gallery spaces with mezzanines, an oak-panelled oval board room and a restored manually operated elevator. Often chosen for filming locations, it has appeared over the years in various productions like What We Do in the Shadows and Serendipity. Special programming: Participate in a "plaque-tivity" and make suggestions for future provincial plaques.

  • Adaptive reuse
  • Full wheelchair access
  • National Historic Site (Canada)
  • Self-guided tours available
  • Site is protected by the Ontario Heritage Trust
  • Washrooms
  • Photography allowed

Contact info

10 Adelaide Street East
Toronto, Ontario
https://www.heritagetrust.on.ca

Architecture

Year built: 1909
Building type: Government building Historical landmark
Architect: George Gouinlock

Dates/hours open

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

Ontario Power Generation – DeCew Generating Station No. 1 Doors Open St. Catharines

Ontario Power Generation – DeCew Generating Station No. 1

Built in 1898, DeCew Generating Station 1 (GS1) is one of the oldest continually running hydroelectric power generating station in Canada. More than 125 years after it was built, GS1 continues to help OPG generate safe, clean, reliable, low-cost power for Ontario. Today, the plant is a working piece of Canada’s hydroelectric heritage.  Pre-registration Required; Onsite Parking Not Available

  • Guided tours available

Architecture

Year built: 1898
Building type: Commercial Historical landmark

Dates/hours open

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

Ontario Regiment (RCAC) Doors Open Oshawa

New

Ontario Regiment (RCAC)

The Airport Armoury supports 'B' squadron training for members of the Ontario Regiment (RCAC), providing space to conduct vehicle and equipment maintenance, as well as related courses. Speak with members about their roles and experiences within the Canadian Armed Forces.

  • Full wheelchair access
  • Self-guided tours available
  • Photography allowed
  • Veterans/Military heritage

Contact info

1220 Keith Ross Drive
Oshawa, Ontario
https://forces.ca/en/

Architecture

Year built: 2000
Building type: Government building Military

Dates/hours open

May 02, 10:00am - May 02, 04:00pm

Orillia Museum of Art & History (Sir Sam Steele Memorial Building) Doors Open Simcoe County

Orillia Museum of Art & History (Sir Sam Steele Memorial Building)

This museum has been an art, culture and heritage hub in the heart of Orillia for over 25 years. Located in downtown Orillia, the clocktower of the Sir Samuel Steele Memorial Building is a beacon for the museum. The museum’s mission is to provide inclusive space to engage community, inspire creativity and celebrate culture, by exploring art and history.

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

Contact info

30 Peter Street South
Orillia, Ontario
Email: visitors@orilliamuseum.org
https://www.orilliamuseum.org

Architecture

Year built: 1895
Building type: Attraction Historical landmark Museum Post office
Architect: Thomas Fuller

Dates/hours open

Sep 19, 11:00am - Sep 19, 04:00pm

Oro African Methodist Episcopal Church Doors Open Simcoe County

Oro African Methodist Episcopal Church

The Oro African Methodist Episcopal Church, built in 1846-49, is a designated National Historic Site. It is one of the oldest African log churches still standing in North America, standing as a testament to both the Black settlers who carefully maintained it for nearly 75 years and the passionate community volunteers who have worked diligently to preserve it.

  • National Historic Site (Canada)
  • Parking
  • Partial wheelchair access
  • Self-guided tours available
  • Washrooms
  • Photography allowed

Contact info

1645 Line 3 North
Oro-Medonte, Ontario
https://www.orofreedom.ca

Architecture

Year built: 1846-49
Building type: Historical landmark Place of worship

Dates/hours open

Sep 19, 11:00am - Sep 19, 03:00pm

Orr Insurance & Investment Doors Open Stratford

Orr Insurance & Investment

Built in 1874 by local builder Thomas Orr Sr., this elegant Italianate home features tall arched windows, decorative brickwork and wide eaves with ornate brackets. Once a private residence, it now serves as the Orr Insurance & Investment head office, reflecting Stratford's rich architectural heritage and the Orr family's long-standing community legacy.

  • French services available
  • Guided tours available
  • Parking
  • Partial wheelchair access
  • Washrooms
  • Photography allowed

Contact info

50 Cobourg Street
Stratford, Ontario
Email: info@orrinsurance.net
https://orrinsurance.net

Architecture

Year built: 1874
Building type: Commercial Private residence Archives
Architect: Thomas Orr

Dates/hours open

Apr 18, 10:00am - Apr 18, 04:00pm

Osgoode Hall Doors Open Toronto

Osgoode Hall

Osgoode Hall — home of the Law Society of Ontario and the highest courts of the province — opened in 1832 and remains a Toronto landmark and symbol of the law in Ontario. The 1867 fence, renowned for its peculiar gates, surrounds the property and its landscaped grounds. Download the self-guided tour or speak with the knowledgeable volunteers. (No tripods allowed.)

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

Contact info

130 Queen Street West
Toronto, Ontario
https://lso.ca

Architecture

Year built: 1832
Building type: Courthouse Educational facility Historical landmark
Architect: John Ewart, William Warren Baldwin

Dates/hours open

May 23, 12:00pm - May 24, 05:00pm

Osgoode Township Museum Doors Open Ottawa

Osgoode Township Museum

Operating since 1973, the Osgoode Township Museum presents the story of Ottawa South’s agricultural and rural heritage. The main museum building is a mid-century two-room schoolhouse that holds the collection of nearly 11,000 artifacts. Explore the galleries, gift shop and research library during your visit. Then step outside and wander through the Agricultural Barn and discover their vast farming collection.

  • Full wheelchair access
  • Guided tours available
  • Kid-friendly
  • Parking
  • Site has blue and gold provincial plaque
  • Washrooms

Contact info

7814 Lawrence Street
Vernon, Ontario
https://osgoodemuseum.ca

Architecture

Year built: 1961
Building type: Museum Schoolhouse
Architect: Balharrie, Helmer & Associates

Dates/hours open

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

Oshawa Executive Airport Doors Open Oshawa

Oshawa Executive Airport

The Oshawa Executive Airport is an aviation gateway to the City of Oshawa and the Greater Toronto Area. Located on 484 acres of land, the airport supports corporate business travel and general aviation with a modern terminal building, dual runways and modern navigational aids. Attractions include Canadian Airforce flyovers, static aircraft displays, and airport bus tours.

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

Contact info

1200 Airport Boulevard
Oshawa, Ontario
https://www.oshawa.ca/airport

Architecture

Year built: 1940-96
Building type: Attraction Commercial Transportation

Dates/hours open

May 02, 10:00am - May 02, 04:00pm

Oshawa Little Theatre Doors Open Oshawa

New

Oshawa Little Theatre

For decades, theatre productions came to life in borrowed halls and makeshift spaces. That changed in the 1970s when the Oshawa Little Theatre purchased a former industrial building and transformed it into a dedicated creative hub. By 1983, the dream became reality with the opening of the current theatre. Come and take a behind-the-scenes look at this popular venue.

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

Contact info

62 Russett Avenue
Oshawa, Ontario
https://oshawalittletheatre.com

Architecture

Building type: Attraction Theatre
Architect: Peter Smith

Dates/hours open

May 02, 10:00am - May 02, 04:00pm

Oshawa Museum: Henry House and Guy House Doors Open Oshawa

Oshawa Museum: Henry House and Guy House

This museum features restored Victorian-era homes, situated on their original foundations. Henry House showcases a traditional Victorian home, depicting family life in the 1870s. In contrast, Guy House features a gallery and gift shop. Each home belonged to prominent harbourmasters from the area. Visitors can enjoy self-guided tours of Henry House, where costumed hosts are available to answer questions.

  • Adaptive reuse
  • Guided tours available
  • Kid-friendly
  • Parking
  • Partial wheelchair access
  • Self-guided tours available
  • Site has blue and gold provincial plaque
  • Photography allowed
  • Rental opportunities

Contact info

1450 Simcoe Street South, Lakeview Park
Oshawa, Ontario
Email: membership@oshawamuseum.org
http://www.oshawamuseum.org

Architecture

Year built: c. 1840
Building type: Historical house Museum

Dates/hours open

May 02, 10:00am - May 02, 04:00pm

Oshawa Public Libraries — McLaughlin Branch Doors Open Oshawa

Oshawa Public Libraries — McLaughlin Branch

Forming part of Oshawa's Civic Centre, this library was a gift of Col. R.S. McLaughlin in 1954. Architect Arthur Eadie was influenced by Frank Lloyd Wright in his design of the McLaughlin Public Library, now the central branch. Explore captivating videos, photographs and memorabilia or attend a guided tour showcasing the library’s evolution over the past 70 years.

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

Contact info

65 Debwewin Miikan (formerly Bagot Street)
Oshawa, Ontario
https://oshawalibrary.ca

Architecture

Year built: 1954
Building type: Library
Architect: Arthur H. Eadie

Dates/hours open

May 02, 12:00pm - May 02, 04:00pm

Ottawa Cancer Foundation, The — Maplesoft-Jones Centre and Cancer Survivors Park Doors Open Ottawa

Ottawa Cancer Foundation, The — Maplesoft-Jones Centre and Cancer Survivors Park

The Maplesoft-Jones building is home to Ottawa's only Community Cancer Hub, where they are transforming supportive cancer care through dynamic collaborations with diverse community partners. They empower people living with, and impacted by, cancer on every step of their journey. And the Cancer Survivors Park is a beacon for those making their way to The Ottawa Cancer Foundation.

  • Full wheelchair access
  • Guided tours available
  • Parking
  • Washrooms

Contact info

1500 Alta Vista Drive
Ottawa, Ontario
https://ottawacancer.ca

Architecture

Building type: Health-care facility

Dates/hours open

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

Ottawa City Woodshop Doors Open Ottawa

New

Ottawa City Woodshop

The building that stands at 430 Gladstone was built in 1910 as a Livery (horse and carriage depot) to support one of Ottawa`s top hotels, The Alexandria. Ottawa City Woodshop purchased the property in 2024, providing a home for unban woodworking in the heart of Ottawa.

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

Contact info

430 Gladstone Avenue
Ottawa, Ontario

Architecture

Year built: 1910
Building type: Historical landmark Studio

Dates/hours open

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

Ottawa Glassblowing Co-op Doors Open Ottawa

Ottawa Glassblowing Co-op

Founded in 2019, the Ottawa Glassblowing Co-op is located in the heart of Ottawa near Little Italy. Their mandate is to foster a glassblowing co-operative that operates inclusively to support the artistic creativity, learning and growth of its members and to educate the public in the art of glass. Come and see glassblowing demos by local artists!

  • Full wheelchair access
  • Kid-friendly
  • Parking
  • Photography allowed

Contact info

957C Gladstone Avenue
Ottawa, Ontario
https://ottawaglassblowing.ca

Architecture

Building type: Commercial Educational facility

Dates/hours open

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

Ottawa Hospital's New Campus, The Doors Open Ottawa

New

Ottawa Hospital's New Campus, The

Jump inside the blueprints to tour a full-scale, furnished mock-up of the patient room-of-the-future and other key room designs for The Ottawa Hospital’s new campus. Guided tours by hospital planning staff will take you behind the scenes of Ottawa’s state-of-the-art hospital plans and how we’re designing spaces. Tours are available in English and French. Registration required.

  • Full wheelchair access
  • Guided tours available
  • Parking
  • Washrooms
  • Photography allowed

Contact info

250 City Centre Avenue, Suite 216
Ottawa, Ontario

Architecture

Year built: 2026
Building type: Health-care facility Studio

Dates/hours open

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