The Montreal Biodome is a facility located in Montreal that allows visitors to walk through replicas of four ecosystems found in the Americas. The building was originally constructed for the 1976 Olympic Games as a velodrome.
Stade Olympique - Built in the mid-1970s as the main venue for the 1976 Summer Olympics, it is nicknamed "The Big O", a reference to both its name and to the doughnut-shape of the permanent component of the stadium's roof. The stadium is the largest by seating capacity in Canada. Incorporated into the north base of the stadium is the Montreal Tower, the world's tallest inclined tower. The building's design is cited as a masterpiece of Organic Modern architecture.