It is difficult to believe that this complex opened in 1992, the exact same year as gargantuan rainforest buildings in Omaha and Cleveland, as well as a rainforest complex in Seattle and the very next year another one in Denver. Mesker Park's is the smallest and least desirable of those 5 examples, and here is an excerpt from my 2010 review:
According to the zoo’s website this aging structure was built in 1992, but it seems to date to decades before that time. Species: clouded leopard, binturong, piping guan, serval, Francois’ langur (7 of these incredibly active monkeys) in outdoor metal cages while inside there were poison dart frogs, smoky jungle frogs, northern pied hornbills, cotton-top tamarins, hyacinth macaws, some fish species and tiger salamanders in subpar enclosures. Ugly exhibits for attractive critters.