Henry's is not as large as other zoos, but big enough to actually see almost all their animals. I spent $$ at the OR zoo and only saw 9 animals. Henry's is free, but I bought some ice cream to help with proceeds.
I easily spent 3 happy hours admiring all the animals. I do, however, question if the polar bear and penguins have been given the appropriate cage conditions.
Biggest WOW factor -- tiger and the black swan. I was truly memorized by their beauty, and ad scared ****less of the tiger! To the stupid 20 something girls who kept yelling "look here tiger...hi!", he will eat you in 3 bites. Don't taut the nice, soft kitty. The fence does look a bit thin.
Bring quarters so you can buy food to feed the goats. I got licked. hee... hee...