Thanks for the comments guys. The nest box was for finches which I used to keep in there, hence the wire roof, but the lizards deceided that the birds tasted nice! So now it is just a lizard enclosure. The lizards sometimes go in the box or just sit on top so I have left it there. The wire top comes in handy though, allows me to put higher logs and plants in and keep out the predators. I got the pool for free, can sometimes find them in the trading post and the like.