I've been lucky to visit a number of zoos in the US northeast and midwest recently and I'm a bit surprised at how many great ape exhibits I've come across that are entirely indoors. Recently I've seen Buffalo (Gorillas), Pittsburgh (Orangutans), Cleveland (Orangutans), and Brookfield (Orangutans and Gorillas). It seems that none of these facilities have concrete plans to change this circumstance (except for Cleveland where a new exhibit should be completed by the end of the decade). Are there other accredited facilities where this is the case? How do you feel about the practice from a welfare standpoint? Are there any exceptional entirely indoor ape exhibits?