It was the 80s. Turns out Ninja Turtles were real, and I and some others went urban exploring to discover the part of the sewer that they grew up in. Turns out it wasn’t even that sewery, it was a series of tile and concrete halls and rooms that were separated by stairways of maybe four or five steps. Sections were flooded, but rarely more than a few feet. Parts of it were dimly lit with sunlight. It was sealed off from other underground sections by thick upward-sliding electronic doors with a glass window in the centre. The turtles were nowhere to be seen; all we found were giant bloatflies that were pretty annoying.