Visitors can get within a couple of inches of the lion-tailed macaques, with no bars or wooden beams in the way. A densely planted, lush, green jungle is the exhibit, and it is one of the best primate habitats that I've ever seen.
That is helpful, but there is also an element of design . They put a lot of effort into maintaining green enclosure too, I assume. How many primate enclosures to not look like the above?