The Cinesphere Theatre at Ontario Place, Toronto.
The Cinesphere is a 35 metre-wide geodesic dome that was designed by German architect Eberhard Heinrich Zeidler and constructed in 1971. It houses the world’s first permanent IMAX cinema.
Of course, they don’t really use the word cinema in North America. Here, you go to a movie theatre to see a film. Anyway, I went to see a screening of John Carpenter’s 1982 sci-fi horror masterpiece The Thing at the Cinesphere last October and it was awesome 😁