On one hand the City of San Francisco has declared this building to be an official landmark, which is pretty darn cool. And it’s huge and — if we consider this is in San Francisco, where $750,000 gets you this — it’s cheap and the Rolling Stones went to parties there back when they were interesting . But… well, poking around the Interweb reveals at least three porn movies were filmed in this house. I was all set to show you some screenshots proving this, but tell me: do you want to spend the afternoon researching 1970s porn?

You do?

Great! Okay! “User submitted,” that’s our slogan! So, lock your office door, put your phone on mute, and see if you can find John Holmes’ The Swizzle Stick. Also Tea Time (tea time?!?), and The Vixen. Have fun!

Found By: Teri

Loveliest comment, by Vivian: See, my head went to a completely different place on the movie thing. I’m picturing Gene Wilder walking down that hallway bent over double at the tiny, tiny door, and playing on a piano keyboard to open it.