Created in 2016, this garden is now run by the Oshawa and Durham Region Métis Council, providing fresh herbs and vegetables to the community. The design is unique and expands on the celebration of Métis history, values, culture and languages that form their proud heritage. During Doors Open, Three Sisters Soup will be on hand to showcase Métis culinary culture.

The Biltmore Theatre chain was owned by the affluent Okun Brothers of Toronto; this was the first Biltmore Theatre constructed in Ontario. The street-facing façade of this classic building features smooth cut stone. Within the upper façade are recessed narrow windows with linear horizontal decorations. Today, The Biltmore is a live-music and entertainment venue with a unique 1940s-era upstairs lounge.

Established in 1962 as a community project of the Oshawa Chamber of Commerce to promote the history of the automotive industry, this museum is home to the world's most significant collection of Canadian cars. It is located in a former 1920s auto dealership. More than 70 vehicles are on display, including Lightning McQueen from Disney/Pixar's Cars 3.

Charles Hall was opened by the Ontario Tech University in 2010 as one of their key academic hubs. This historical building dates back to 1903 when it first served as a textile factory for Eaton’s. Over the years, it has been owned by many companies, including General Motors and Alger Press, who produced Oshawa’s first newspaper.

A source of civic pride and recognition in Oshawa, the Greenhouse has received provincial, national and international honours from Communities in Bloom. With four fulltime gardeners and 12 seasonal staff, the Greenhouse takes pride in designing, growing and maintaining the city’s extraordinary gardens. During Doors Open, discover the process from seed to bloom for the spring planting.

This landmark brick armoury was built between 1912 and 1914. It is home to the Ontario Regiment Royal Canadian Armoured Corps, established in 1866. When the First World War broke out, the armoury was used as a training and recruitment centre. The only Canadian army presence in Durham Region, this armoury remains a functioning military establishment. (No photography allowed in the officers' mess.)

Come and explore the Oshawa office of HOPA Ports — the federal marine ports servicing Ontario. Oshawa is one of the few cities that can boast an airport, rail lines a deep-sea port and a 400-series highway all within close proximity, offering importers and exporters a competitive edge. HOPA Ports supports local initiatives that benefit the cities where they operate.

This memorial is dedicated to the men and women employed at the British spy training school located here during the Second World War. Over 500 agents trained here to go behind enemy lines and “set Europe ablaze,” as dramatized in CBC Television’s X Company. During Doors Open, join expert Lynn Philip Hodgson for a guided tour (terrain can be difficult).

The first mosque built in Oshawa is reminiscent of the Ottoman Empire. Ornamental crescent moons enhance both the main prayer hall dome and the dome atop the minaret. Over the years Muslims and non-Muslims have used the premises for meetings, lectures, studies and community and educational purposes. Shoes are to be removed before entering the prayer hall.

The Ontario Regiment (RCAC) Museum commemorates the history of Durham Region's Canadian Army unit, the Ontario Regiment (RCAC), and is home to Canada's largest collection of operational, historical military vehicles. Come and view artifacts from the regiment from 1866 to present day. And explore the Military Vehicle Conservation Centre. Check out the Tank Arena and — maybe — book a ride!

The Oshawa Museum has celebrated the city’s history for over 60 years. Henry House, built c. 1840, was the family home of Thomas Henry, a local minister, farmer and harbourmaster. Henry House is portrayed as a period home, typical for the late 1800s. During Doors Open, visit the home and see a Victorian kitchen, with demos throughout the day.

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 Oshawa’s central branch. The library regularly hosts programs on many topics, from local history to 3D printing. There’s something here for all ages to enjoy!

Purple Woods Heritage Hall is a post-and-beam structure designed to create a natural meeting place to embrace the environment in a location accessible to the surrounding community. It hosts the Maple Syrup Festival each spring and is used for year-round environmental education and events. It is both esthetically and environmentally suited to its location on the Oak Ridges Moraine.

The Regent Theatre, built in 1919, has a Georgian façade. One of Oshawa’s few remaining examples of this classically inspired style, the building was designated in 2001 and reopened in 2010 for the Ontario Tech University, as well as for community and cultural events. During Doors Open, they will be handing out popcorn and free tickets to the movies!

The original gallery (1969) was a square, stone, modernist structure. In 1987, architect Arthur Erickson designed an expansion that added an additional 3,345 square metres (36,000 square feet) to meet the growing needs of the gallery and the community. Erickson built his newly designed space around the existing structure, incorporating the original stone façade into the dramatic lobby design.

Built in 1867 in the Gothic revival style, Simcoe Street United Church is Oshawa's oldest church. Lancet-arched openings and a polygonal spire with pinnacles and dormers embellish the exterior. A pressed-tin ceiling, 11-metre (36-foot) high ornamental timber arches and a Casavant organ dominate the interior. For Doors Open, explore some displays and even ring the bell.