Andrew posted a few pictures of vintage Japanese slides [suberidai] on his blog, and I realized it's been two years since I visited iharay's amazing online collection. He's up to 517 slides now, and not even half of them are shaped like giant concrete octopus.
This is what pushed my buttons, a crazy cage-like contraption in Osaka. I'm sure there's a slide in there somewhere. Then there's this all-slide concrete double helix in Tokyo.
Suberidai Hozonkan | The Park Slide Museum [iharay]
Previously: Tako-no-Yama: The Itinerant Octopus Slide Builders Of Japan