No, they don't allow it, and not only have they put bars on the top and bottom of the stairs, but they have actually broken up some of the cement stairs at the bottom. However, across the street from what is now Pushcart, there is a nice older lady named May, and if you talk to her and arrange it with her first, she will let you go down the stairs to the cave from her property so you can see it and swim around down there it is pretty neat and worth checking out.