Woodland Park Zoo in Seattle opened its award-winning Tropical Rain Forest building in 1992. The real gems of this zone are the outdoor habitats: two trend-setting gorilla exhibits, Jaguar Cove, a red ruffed lemur exhibit, a colobus monkey exhibit, and a red-flanked duiker/colobus monkey island. The outdoor exhibits were built from 1979 (gorillas) to 2003 (jaguars).
The 19 exhibits (in order) plus walk-through aviary as of April 10th, 2011: