If you’ll recall, in the 90s there was an “exploratory adventure game” called Myst (I don’t know if that’s the genre it’s marketed under, but it seems appropriate). In one puzzle, the player has to turn on a pump which drains water from a sunken lighthouse. The lighthouse has to be drained so the player can find another clue or get a key or some crap like that. Today I did something similar, except we drained a basement by hooking a sump pump up to some old eavestroughs and sending the water into the front yard. Also the basement wasn’t drained in order to solve a puzzle, it was so we could get a furnace out.