Observatory to Hollywood Sign Ascent
Griffith Park is one of the largest municipal parks in the US. It's home to the Hollywood sign, the Griffith Observatory, and it's been featured in films and TV shows for decades.
It's a pain to get there, and parking is impossible, but it's also beautiful, and it's wild enough to be home to P-22 since 2012.
I first went below the Hollywood sign, then did a surprisingly difficult climb to the summit behind the sign, where I was surprised to find that the "D" is still there. I got a great photo overlooking Bojack Horseman's house.