The Second City is the largest improvisational comedy theatre and training centre in Canada. Its list of famous alumni includes John Candy, Eugene Levy, Catherine O'Hara, Martin Short, Dan Aykroyd, Andrea Martin and many others. In June, they celebrate 50 Years of Funny. During your self-guided tour, knowledgeable volunteers and staff will be available to answer questions. Bring your camera! (No tripods allowed.)

The Friends of Second Marsh is a charitable organization dedicated to connecting people with nature through interpretation, education and stewardship services. This site features approximately 7 kilometers (4 miles) of hiking trails. The McLaughlin Bay Wildlife Reserve offers self-guided tours of its naturalized areas and trail system. Leashed dogs only allowed on the Waterfront Trail and in Darlington Provincial Park.

Explore the hidden history of Canadian radar at The Secrets of Radar Museum. In the spirit of “Cheers to Years: Celebrating 25 Years Together,” learn how WWII radar personnel, sworn to secrecy for 50 years, helped win the war. Discover radar’s lasting impact, from military innovation to everyday uses like weather forecasting, while honouring veterans and their legacy.

Come and see the wonderful world of Downtown Hamilton's street art! Some sculpted, some painted. Some permitted, some not. Follow the Downtown Hamilton BIA's self-guided tour using the interactive map to see where some of Hamilton's finest artists have turned concrete into canvas and hear from local street artists about their stories and how their murals came to be.

Doors Open will offer visitors the opportunity to visit a typical Masonic Lodge (normally not open to the public) and learn about the history and ideals of Freemasonry — the world's oldest fraternity. The original charter for Seven Star Lodge was granted in 1872 and is on display along with other historical artifacts. Meetings have been held here since 1917.

With over 120 hectares (300 acres), this property includes a beautiful lake, natural forest, walking trails and buildings over 100 years old. During Doors Open, visitors will enjoy walking tours, slideshows and displays depicting the site’s history. Bring your children to enjoy field games and campfire activities.

With 856 seats, this is the Shaw Festival's largest venue. Built in the modernist style, it was designed to provide a spacious yet intimate audience experience. While touring backstage, you will hear stories from docents about the history of the theatre, the ensemble and secrets of the 2026 season. Come and learn about the importance of real human connection.

This 1885-86 building in the heart of Dundas has been a foundry, indoor skating/curling rink, bus depot, warehouse and, since 2016, this brewery. The wood post-and-beam/brick masonry structure has been preserved yet modernized with the latest in craft beer equipment. The brewery focuses on German-style lagers with an emphasis on quality and authenticity.

Experience the magic of filmmaking at SheepDog Animation, an internationally recognized award-winning youth studio. Our rich curriculum bridges traditional art history and cutting-edge technology. Visitors can dive into hands-on creativity with our stop-motion animation stations, explore our digital gallery and interact directly with the next generation of tech by playing video games designed and coded by our talented students.

Shingwauk Kinoomaage Gamig is honoured to participate in Doors Open Ontario. Visitors are invited to explore Shingwauk Kinoomaage Gamig and learn about the enduring vision of Chief Shingwauk, the revitalization of Anishinaabe knowledge and culture and the significance of this site as a place of learning, gathering and community.

Showplace has been home to outstanding live performances since 1996. Built in 1947 as the Odeon Cinema, it later operated as the two-screen Trent Cinema from 1979 to 1995. Purchased by the newly formed Showplace Board of Directors, the building was lovingly transformed into a vibrant live performance venue that continues to entertain audiences today.

The 43-hectare (107-acre) Banting Family Homestead was the birthplace of Sir Frederick Banting, co-discoverer of insulin. Banting was also Canada's first Nobel Prize winner. During Doors Open, come and explore exhibits, walk the legacy trail, enjoy lunch in the picnic area, see the historical farmhouse and drive shed, and learn more about Banting’s journey in the fight to combat diabetes.

Built in 1824, this restored Georgian limestone building is now the Sir Isaac Brock Bed & Breakfast, featuring luxury suites in historic downtown Brockville. Tour the parlor, sitting room, formal dining room, kitchen and exterior spaces of this heritage designated property, located steps away from the Aquatarium, Brockville Arts Center, fine dining establishments, the railway tunnel and St. Lawrence River. 

Along the Raisin River lies one of the oldest homes in Ontario. This Georgian-style house was built for Sir John Johnson (a soldier, Loyalist and public servant) between 1784-92. This site was chosen because it is a natural location for water-powered mills. The house is now a National Historic Site, dedicated to preserving local history through archives and tours.

Slinky Swellness Centre is a mobile, multi-sensory home-studio located in a house built in 1921. Since 2018, the space has been inspired by "Snoezelen" rooms, therapeutic play and one-of-a-kind woven slinkies. Facilitating inclusive programs, gatherings and the birthplace of "CathARTistry" — expression as a tool for growth and catharsis.

This site features moving lights, vibrant colours, and black light effects. It may not be suitable for visitors with light sensitivity

Housed within an adaptively reused former music venue, the studio retains traces of its past life through its open plan, exposed structure, and layered materials. Now home to a residential design practice, the space supports the creation of modern, site-specific homes through a collaborative process, where sketches, models and materials remain in constant dialogue.

The South Nepean Muslim Community Mosque is excited to participate in this year’s Doors Open Ottawa, welcoming visitors to explore their beautiful and vibrant community space. Come and tour the facilities, including the spacious prayer halls, serene meditation areas and versatile community spaces that serve as hubs for learning, worship and social engagement. Light refreshments will be provided.

The exterior of the Southminster United Church is Nepean sandstone, the same stone used for the Parliament Buildings. The entrance ends at a pointed arch gate that leads into the church porch, which opens into the narthex. Beyond is the nave, which consists of five bays on each side, a central aisle and smaller aisles on each side.

Come and tour Spadina House and discover the home of the Austin family from 1866-1982. Period rooms contain furniture and decorative details from the 1920s and 1930s. Co-owned by the Ontario Heritage Trust and the City of Toronto, this site includes three floors, an orchard and the newly created Aki Wiidookaagewin "Ontario Earth Helpers" Indigenous kitchen garden. (No tripods allowed.)

This site is a unique, non-denominational place of worship. Sathya Sai Baba’s life message is to "love all, serve all" and "help ever, hurt never," strongly promoting the unity of faiths as depicted through symbols and messages on the centre’s pillar. During your Doors Open visit, explore the stupa at the entrance, the main prayer hall, library and classrooms.

This site includes a temple that was constructed in the Chola temple architectural style of South India, with 12 sanctums housing different idols of Hindu gods. There is also a heritage museum consisting of 25 specially made marble murals carved in India that describe the teachings of the Hindu monk Shankaracharya who revived Hinduism about 1,000 years ago.

St. George's Hall is a Toronto landmark. Built in 1891 by the St. George's Society, the building has been home to the Arts & Letters Club of Toronto since 1920, a private club formed in 1908, a social club centred on the arts. Founding members include Group of Seven painters, Robertson Davies, Vincent Massey, Marshall McLuhan, Mavor Moore and others.

St. Andrew by-the-Lake Anglican Church is a lovely neo-Gothic wood-framed church surrounded by parkland and lagoons on Toronto Island. It holds services year-round on Sunday mornings. The building has beautiful acoustics and some stunning stained-glass windows. St. Andrew's is the last remaining church on Toronto Island and will celebrate its 142nd anniversary this year.

The original 1794 church was burned by the American army during the War of 1812. A new church was later erected, but was also destroyed by a cyclone. In 1855, the current building was constructed. While major restorations have occurred over the years, the interior and exterior of this architectural gem appear much the same as the 1831 building.

Discover St. Andrew’s Presbyterian Church, a vibrant part of Aurora's heritage since the congregation was established in 1871. Explore the church’s rich history, architecture and enduring role in the community. Visitors can learn about generations of worship, service and fellowship while experiencing a welcoming space that has connected residents and supported community life for over 150 years.