This building is considered one of the finest examples of Loyalist or late-Georgian architecture in Ontario. Original owners Thomas and Margaret Montgomery, Irish immigrants, operated it as a tavern until Margaret's death in 1855. The inn has been restored as a mid-19th-century tavern, a reminder of the pivotal role that inns played as community hubs in the settlement of Ontario.

As Stouffville’s only brewery, Muddy York is a gathering place for both locals and visitors. Founded in 2013, Muddy York has called Stouffville home since 2024, where it brews award-winning beer onsite. Muddy York also offers a unique space for events and community experiences. During Doors Open, guests are invited to enjoy a tour and learn more about the facility.

For over 20 years, the Museum of Contemporary Art Toronto has featured the work of 1,100-plus Canadian and international artists. In 2018, they moved into this purpose-designed space in the Junction — once Toronto’s tallest building. The original factory produced aluminum products for the Second World War. When it opened, it was considered innovative because it used concrete slab architecture.

The Museum on the Boyne is a community museum that represents the history of South Simcoe County. Exhibits highlight famous local Canadians, notable industries and unique artifacts from the area. Children can complete the artifacts scavenger hunt or enjoy other hands-on activities. Guided and self-guided tours are available and there is a gift shop. Check out www.motb.ca for current hours. 

The Muslims in Canada Archives is housed within the Jackman Humanities Building at the University of Toronto. Designed in 1929, the building was constructed to provide facilities for the medical profession. The preserved stone detailing and grand lobby are key features of this designated building. The fifth-floor offices exhibit archival materials relating to the historical presence of Canadian Muslims.

Home to the Good family for four generations, this Georgian farmhouse was built in 1837 with an addition in 1858. On this site is a hexagonal silo built in 1902 and a (still-functional) blacksmith's forge built by William Charles Good in 1891 when he was just 15 years old.

From 1883 to 1976, the Neilson Store provided Amherst Islanders with their basic necessities. After it closed in 1976, there were many changes in ownership until the building, newly renovated dock and grounds were sold to Loyalist Township to become the Neilson Store Museum and Cultural Centre. Come and learn more about the history of the store — and Amherst Island.

Nepean High School opened its doors in September 1923, welcoming students from all corners of Nepean Township. Visitors will learn about the caretaker and his wife who lived in the school, the students who served in the Second World War, an airplane built by cadets in the school basement and more fascinating stories from the past told by students from the present.

This sailing club is a family-oriented, volunteer-based organization dedicated to promoting and encouraging active participation in the sport of sailing and recreational boating. Since opening, the club has provided a range of cutting-edge public and member programs, as well as hosting important aquatic events and national regattas. The terrace offers stunning views of the Ottawa River.

The Netflix office in The Well offers stunning views of the city. It is Netflix’s first-ever home in Canada. A variety of teams dedicated to all things Canadian currently operate here, whose focus is to create and champion Canadian stories and celebrate Canada's creative industry. During Doors Open, enjoy interactive activities to connect with your favourite Netflix shows/films.

The Music Hall was originally built as Centenary Methodist Church in 1868. Designed by architect Albert Harvey Hills, the building is a stunning example of Victorian-romanesque style. Now the New Vision United Church (The Music Hall) is a designated building in the City of Hamilton. It boasts soaring ceilings, glorious acoustics, a wrap-around mezzanine and massive stained-glass windows. 

The Niagara Lodge No. 2 is the oldest Masonic lodge in Ontario. It is also the site of the first legislature of Upper Canada and the site of the first hospital in Newark, founded by Col. John Butler. During Doors Open, come and explore the museum of Masonic artifacts not regularly available to the general public.

The Niagara Masonic Memorial Temple Association welcomes you to their first Doors Open Event. Originally built in 1891 as St. George’s Ward Primary School, this St. Catharines landmark educated generations of local students before closing in 1952. The building was later transformed for community use and now houses the Niagara Conservatory of Music and four masonic lodges.

Located on the banks of the Niagara River in a heritage building that formerly supplied water to Niagara-on-the-Lake, the Niagara Pumphouse Arts Centre connects the community through visual arts programs, exhibitions and events. The Niagara Pumphouse Art Centre Association was formed in 1990, and the building was restored and converted to this visual arts centre in 1994.

Decew Falls Water Treatment Plant has been processing drinking water for residents since 1876. As Niagara Region’s largest water treatment facility, it is designed to treat 227 million litres of water per day. The site is unique compared to other water treatment plants in Ontario due to its gravity fed distribution system. Pre-registration for all tours is required.

Founded in 1877, the Niagara-on-the-Lake Lawn Bowling Club is one of the oldest in Canada. Before this club was built, they bowled on the grounds of the Queen’s Royal Hotel. Today, they are located at the adjacent community centre, where visitors can learn more by stopping by the Mori and Simpson rooms during Doors Open.

Explore this fine example of one of the few remaining early pioneer timber-constructed log cabins in Haldimand County. The cabin was built circa 1835 by Thomas Nicholas for his family of 13. Enjoy guided and self-guided tours to learn more about Haldimand's pioneer history.

The North West Company Lock is located at the foot of Huron Street. It is actually two structures built almost 100 years apart. The stone replica lock seen today was built in 1896 and lies over the floor and framework of the original lock built in 1797. The lock was built to help laden canoes and boats navigate the rapids.

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.

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. 

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.

Visitors are invited to tour part of the Training and Development space of OC Transpo and get behind the wheel of the driving simulator. Tour the space and get a behind the scenes look at how OC Transpo staff are trained safety and effectively.

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).

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)

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.