First Question: This zoo contains one of very few large polar bear exhibits with an underwater viewing tunnel in the U.S.
Columbus Zoo has a polar bear underwater tunnel and viewing while Point Defiance Zoo doesn't have a underwater viewing tunnel but still has viewing windows where you can see the polar bears swim year round.
This tiny zoo is filled with millions of Chironomus plumosus for about a week and a half every year in May.
Second Question: This zoo was once known to have the only known proboscis monkeys in the United States until the last two monkeys were sent to Singapore Zoo as of 2003.