Someone built these crazy concrete slides in the most random place in the Castro. Basically you grab a piece of cardboard at the bottom of the slides, then go up to the top, and slide down. Not exactly rocket science, at least I don’t think so (I really don’t know what rocket science is). My advice is to not try to hold on to the card board with your hands because you might scrape them. The place is a little inaccessible, you might need a car, but the way to get there is this: Take 17th St. away from the Mission, and turn left on Douglas. Then take Douglas until you hit Seward and turn right. You’ll see a little park thing on your left, and that’s where the slides are. Have fun!
ps I just found out about the story behind this place. Read it over at Found SF.
Seward Street Slides
Seward & Douglas
photo from Bo H on yelp