That seems like a very good enclosure. I don't think I have ever seen bearded dragons being housed in such a large space before. I'm curious about the risk of natural predators such as birds of prey though.
@David Matos Mendes This enclosure is located right at the front of the zoo in a well-shaded area with nearby tree coverage. The lizards have access to lots of hiding spots as well. You do however raise an interesting point about the potential for predation as the zoo does have wild eagles and goshawks that can be seen regularly. Several zoos in Australia house their lizards outdoors in similar open-topped enclosures.