Very interesting concept. The only other time I've heard of walk-through exhibits containing free-range captive reptiles is the greenhouse in Royal Botanical Gardens here, where there are some small lizards that are used for insect control.
@Damson - Thank you for the info. Its a cool idea but on the other hand its kinda creepy. Do you know if there is still a walkthrough anaconda exhibit at (I think) the Paris Zoo.
If you want to see a walk through with boas in the US the non-AZA accredited Reptile Gardens in Rapid City, South Dakota has boas in a dome along with bobwhite quail, various parrots, zebra finches, doves (not sure of the species), and various lizards and turtles/tortoises. It's not arranged geographically but is a neat design.
