Ontario Place, Water park on Lake Ontario waterfront in Toronto, Canada

Ontario Place is a park and entertainment venue on three artificial landscaped islands in Lake Ontario, south of Exhibition Place in Toronto. Its five square steel-and-aluminum pavilion pods, 88 feet (27 m) on each side, are suspended above a lagoon by steel cables from four pylons driven into the lake bed. The site also holds the Cinesphere, a marina and the RBC Amphitheatre.

Ontario Place opened on May 22, 1971, built by the Ontario Department of Trade and Development on three artificial islands made from city landfill. Architect Eb Zeidler's barrier-reef design cut pod foundation costs to a tenth of the open-water estimate. The Forum, a revolving round stage with seating on all sides, was demolished in the 1990s despite his protests and replaced by the Amphitheatre. The park closed after the 2011 season.

The Forum, the park's early open-air amphitheatre, drew crowds with free concerts by well-known artists included in the admission price. Its round revolving stage sat in a recessed pit with seating on all sides, so every seat had an equal view, first come first served. In the 1990s it was demolished despite protests from architect Eb Zeidler and replaced by a proscenium-arch Amphitheatre with ticketed banked seating.

Ontario Place sits on three artificial islands in Lake Ontario, south of Exhibition Place and southwest of downtown Toronto. The site has no admission fee since reopening as a park. The Cinesphere is currently closed for renovations, and the exhibit pods above the lagoon have stayed closed since the Atlantis event facility shut; the marina and RBC Amphitheatre operate seasonally.

The five pavilion pods are square, 88-foot (27 m) steel and aluminum structures suspended above a lagoon by cables from four pylons driven into the lake bed. Architect Eb Zeidler cut foundation costs to a tenth of the open-water estimate with a barrier-reef design, after a trip to the Caribbean.