This isn't really a place you go by accident, but you probably drive past all the time without really thinking about it. Below are some shots of buildings on the east side of the park (the west side is more 1970s utilitarian). It's just off Highway 280, between Hollywood Blvd. and Lakeshore.
Here is a close-up of the elevated walkway from above. I have no idea where it goes -- into the woods, it appears. Anyone game for a hike?