Tuatara Exhibit in the Islands at Te Wao Nui, Auckland Zoo.
This excellent exhibit houses Tuatara, which although inside, recieve natural light (and possibly ventilation?) from skylights. The opposite wall has five smaller exhibits for native geckos and skinks.
Te Wao Nui Review here:
http://www.zoochat.com/17/te-wao-nui-review-236615/