Spanning more than 80 acres in Denver’s historic City Park and home to numerous endangered species, the Denver Zoo is itself a rare bird among animal parks. With Bear Mountain, it was the first in the nation to create a naturalistic habitat; since then it has gone on to build Predator Ridge for African wildlife, the world’s largest Komodo dragon exhibit, and various other sanctuaries for the threatened likes of Andean condors, Pallas’s cats and Bactrian camels. But there’s nothing like Mshindi—a rhinoceros who paints with a brush and whose works are on permanent display in the Pachyderm House.