(Alcan Pavilion buildings: Marine Circus & Main Aquarium)
The Montreal Aquarium, also known as the Alcan Aquarium, was a public aquarium on St. Helen's Island, in Montreal, Quebec, Canada. Built for the 1967 World's Fair (Expo 67), the two-building site operated for nearly a quarter of a century in La Ronde before shutting down in 1991. The main aquarium building was demolished in 1997, but the pool building still remains. Apart from a brief re-purposing as a video game center, it has been vacant ever since.