Constructed in 1911, Niagara Falls Armoury was one of 11 built during the 1896-1911 Canadian Militia Reform and Expansion. Originally home to the Lincoln militia, and later the amalgamated Lincoln and Welland Regiment, it ceased its military operations in 1999. See exhibits: Afghanistan War, Arsenal/Artillery, Black Military History, Niagara Scouting, War of 1812 and from the Army, Navy and Air Force.

Visitors to the museum in the heart of Niagara Falls will experience history first-hand. Try on a replica uniform from the War of 1812, feel the heft of a musket, build a bridge to span the Niagara Gorge or walk the tightrope like the daredevils from days gone by. Guided tours at 11am and 2pm. Free parking behind the museum.

Hours Open: Sunday: 11 a.m. to 5 p.m. Guided curator tours at 11 a.m. and 2 p.m.

The Niagara Falls Innovation Hub is an example of adaptive reuse in the former Federal Customs Border Services offices. Today, it is Niagara's leading business support hub offering premium amenities, cutting-edge technology and business support in a collaborative, affordable workspace including a podcast and multimedia studios. Enjoy a guided tour, giveaways and see members demonstrate their products.

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.

The Niagara Historical Society opened this museum in 1907. It collects, preserves, researches, educates and promotes the history of Niagara-on-the-Lake and area — inspiring a local history appreciation through engaging programs and exhibitions. During Doors Open, there will be pop-up curator-led tours of the exhibits and heritage baking samples. Visitors can also explore the latest exhibition, Curators: Our Eras Tour.

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.

Step inside this beautiful 1956 chapel to discover intricate carvings by renowned sculptor Dora de Pedery Hunt, vibrant stained-glass windows by artist Yvonne Williams and a magnificent Casavant Frères pipe organ. Rich in artistry, craftsmanship and sacred heritage, the chapel offers a unique opportunity to experience an architectural and cultural treasure.

Nuit Blanche London 2026 transforms Dundas Street into a vibrant space for exploration. As a dynamic urban canvas, it invites visitors to experience the city in unexpected ways. This year’s theme, "This Is Not a Landmark", challenges traditional ideas of public space, encouraging fresh perspectives on how we define, use and interact with the urban environment around us.

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.

Oakwood United Church was built in 1912 as a Methodist church and has served the village ever since as a place of worship and community gathering space. The church's significant collection of stained glass was sourced from the Toronto Plate Glass Importing Company and contribute to this beautiful building's distinctive architecture.

This post office, constructed in 1875, is one of the oldest restored freestanding post offices in Ontario. It has served many roles over the years and is now home to the Manvers Historical Society. Come and see what a post office looked like when mail was the way that people stayed connected. 

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)

Built in 1875 in the Italianate style, the Old Examiner Building was home to the Peterborough Examiner from the 1880s through the 1930s. During Doors Open, visitors are invited to step inside this historic landmark and explore its new life as the modern offices of B&A Landscape Architects and EcoVue Consulting. Entrance is located on Chambers Street.

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.

Built in 1825, Old St. John's Church is one of the earliest remaining examples of the vernacular Gothic Revival style in Ontario. It served for over a century before it was deconsecrated in 1962. The Old St. John’s Stamford Heritage Association restored the building and secured its heritage designation. In 1990, the Association repurposed the church by opening a columbarium.

Designated in 2024, this schoolhouse was built in 1915 in the Prairie style — a rare example of this architectural style in Ontario. It was designed by architect Francis Conroy Sullivan (1882-1929), the only Canadian student of Frank Lloyd Wright. The schoolhouse is currently being restored to be returned to community service by the non-profit Wooler & Area Community Organization.

The Omemee Legends and Lore Walking Tour is a self-guided walking tour of downtown Omemee that explores the historical buildings and the stories behind them on Omemee's main street. Pick up your self-guided tour brochure outside Coronation Hall and explore Omemee's historic past.

The Omemee Train Station served what was once a bustling train line that ran through the village of Omemee. The station has long been unused and is currently located behind Lady Eaton Elementary School. The Omemee Lions, now campaigning to move and restore this building, invite the community to see the train station and learn about its past and future.