The city's fix was to wrap a chain around the entrance to the tunnel and strap a wet floor sign to it.

They couldn't even be bothered to put an actually applicable sign up. That's government for ya!

Place looks pretty great though. Even though it was a very long time ago I used to absolutely love these things. I'm sure you can remember back to how dangerous these places were in the 80's though and I don't think my parents even gave a damn.