:yup...mine has a rock cave buried in the substrate, so it appears like a hole and that is where he retreats to :) Cool, I'll bet that looks nice too. I've got rock caves for my bearded dragoons, it goes nice with the whole desert theme. My tegus get a big unsightly rubbermade type of container but I cover most of it up so it's dark in there. When I open it up it's looks like a ant farm with one big U shape tunnel that goes around the sides and back. For some reason they both like to sleep in the same hide box even whan I had two available.