Vanalden "Cave"
The Tarzana area of Los Angeles hosts a geological feature known as the Vanalden "Cave". I'd heard about it but never bothered to visit until now. Getting to it was OK, even if the "cave" wasn't. And, yes, I'm going to keep up the scare quotes.
I knew going in that the "cave" wasn't much and that it was defaced with graffiti, but I was even more disappointed when I got there. It's basically an overhang with a few holes in it, and it's impossible to get a picture that doesn't have spray paint in it.