That brings back memories. When I was a kid in the 60s I got to set foot in The Time Tunnel! Friend's mom worked at the studio. A bit of a letdown to discover it wasn't really a tunnel - just a series of white-painted rings on a black background (which you can make out in the photo above).
Also got to watch them film an episode of Lost in Space (the whole cast was in pajamas, for some reason, and Dr. Smith turned out to be a really cool guy who gave snotnosed kids tours of a spaceship), wandered around the Seaview set from Voyage to the Bottom of the Sea, and sat in the original George Barris Batmobile.
I was so excited that day I no doubt peed my pants. Hope I didn't mess up the Batmobile upholstery. Still a vivid memory a hundred years later.
And later, in a shopping mall, I got to sit in the original James Bond Aston Martin. This was the culmination of my life, and everything since then was/is pretty much downhill.