Just outside of LA, this spot has been transformed into Ireland, Korea, and Old West...it used to belong to movie studios, now it's a State Park. You would recognize many of the movies and TV shows filmed here...perhaps one of the most well known was MASH. You can see what's left from the photos. The original sign post has burned down, but the vehicles are authentic. They even have some local signage showing you the specific locations of the MASH set. Easy to park at the trailhead, and it's free!