Doors Open Fort York Historic District Walking Tour Fort York and the Garrison Common: Battlefields, Graves, and Urban Development Sun. May 29, 1 to 2:30 pm Starting at the canteen at Fort York National Historic Site, this special walking tour explores the evolution of Fort York’s Garrison Common area. This almost forgotten corner of the city has witnessed some of the most dramatic events and substantial change in the evolution of modern urban Toronto. Rain or shine. Free admission to Fort York following tour