I've seen a few caves like those. And a breeder by my job has some. I like the way they look but I was told that even though most of those caves advertise showing ball pythons in them. A ball python will outgrow it. I wouldn't mind having one of those caves for my 55gal that my big girl is in but after seeing the large cave i don't think she would fit inside...even if the cave fit in my tank. I ended up making her hide out of a cardboard box...Not the most natural looking but it get's her done!