Everyone's heard of the LA Zoo, but not everyone knows that right next to it is the old version. The abandoned version. It's not as sketchy as it sounds, I promise. The old zoo has been converted into a hike/picnic area in plain view of the old enclosures. Of all the sights to see in LA, this is one of my favorites.
I went with the specific purpose of adventure in mind. Now, I'm not telling you that the only way to get the full experience is to mildly trespass, but it certainly wouldn't hurt. If you're not into the whole misdemeanor part of life, there is still plenty to see. They even have picnic tables for you to eat and be merry. Great birthday party spot, if you ask me.
The Abandoned LA Zoo is definitely a gem of a place. It may not be the nicest spot, but it's definitely one of the funnest. It also makes for a good photo spot.