The Don Valley Brick Works, also known as Evergreen Brick Works, is a former quarry and industrial site located in the Don River valley in Toronto, Canada. The Don Valley Brick Works operated for nearly 100 years and provided bricks used to construct many well-known Toronto landmarks, such as Casa Loma, Osgoode Hall, Massey Hall, and the Ontario Legislature. Since the closure of the original factory, the quarry has been converted into a city park which includes a series of naturalized ponds, while the buildings have been restored and opened as an environmentally-focused community and cultural centre by Evergreen, a national charity dedicated to restoring nature in urban environments.