It looks like a random Star Trek set plopped in the middle of a secluded meadow. Cycle or walk the Humber River Recreational Trail in Toronto and you’ll come across this curious saucer-shaped rain shelter on stilts, with an oculus opening cut out of its roof, from which a circular beam of light shines down onto the concrete. It’s actually a public washroom—or was—designed in 1959, when the city of Toronto had space-age fantasies and a love for modernist architecture, apparently. It served the then-new South Humber Park, which was…