Rideau Hall This national historic site is an idyllic 79-acre urban oasis and it is located only a few minutes from downtown Ottawa and Gatineau. You are welcome to visit the residence and workplace of the governor general and the park year-round. Many activities await you. Find out now what to see and do! The Citadelle Steeped in history, this place has been the second official residence of Canada’s governors general since 1872.