It's a cool place to visit overall. We visited on ...

It's a cool place to visit overall. We visited on Saturday, and we followed vistor sign to the visitor parking lot. There are a bunch of bikes right next to the parking lot. I saw other ppl ride them, so I thought they are for visitors, but someone told us they are only for workers when we were riding. I suggest google that putting a sign about "workers only " or something like that because we had no idea (there is no sign).