Parliament Building, Ottawa Canal, Ottawa River Parkway, Britannia Park, Gatineau Park (HULL), Museum Of Civilization (HULL), War Museum(two part one ticket), National Gallery of Canada, Ottawa River Cruise (board from HULL), 24 Sussex drive (Primer Minster's House), Museum of Aviation, Casino de HULL and etc.
There are so many places to visit. To people who love to travel, you will find a lots of interesting places; to people who do not enjoy traveling, there are NONE. So I said.