Here’s something I didn’t know. Untapped Cities has shared images of the somewhat secret elevated park at 55 Water Street in Downtown Manhattan. The park is located up a flight of escalators at the address shown and was completed in the 1970s. It is known as the “Elevated Acre” and its purpose was to allow the building owners at 55 Water Street to add 6 and a half more stories to a building, provided that the owner of the building include a public plaza.

It’s not the biggest of spaces and I probably wouldn’t go out of my way to hang out here, but if you’re in the neighborhood it seems like a decent stop to make.