Embark on a journey through time with a historical tour of this museum, showcasing its development from 1940 to its present-day status as a bustling hub of international air travel. Explore and indulge in artifacts and images detailing its transformation from a Royal Canadian Air Force base to a global connector. Engage in recreational activities including games and outdoor sports.

Celebrate 100 years of York Regional Forest at this innovative LEED platinum-certified building, which creates more energy than it uses. Functioning as the hub for York Region Forestry’s educational programming, this centre was built using local and recycled materials. Explore the 100th anniversary display and take a guided tour of the facility.

The Imperial Cotton Factory, built in 1900, ran as a factory until 1972. It has been repurposed as the largest creative hub in the Hamilton area — with studios for artists, artisans, musicians, craftspeople and entrepreneurs. Film and television productions, photographers and special events are also drawn here. This year's Door's Open Hamilton is also the Cotton Factory's 10th anniversary.

Oshawa’s newest fire station is a 992-square-metre (10,675-square-foot) single-storey building, designed to complement the historical legacy of Windfields Farm. Built on the former Windfields Farm land (the birthplace of champion racehorse Northern Dancer), the building also reflects the area's agricultural history. Tour this unique space, explore a collection of Windfields Farm memorabilia and view fire safety information.