I love the Oregon Zoo. When my three children were very young we had a membership and went all the time. It is one of the finer zoos for a mid-sized city like Portland.
The Oregon Zoo, originally the Portland Zoo and later the Washington Park Zoo, is a zoo located in Washington Park, Portland, Oregon, approximately 2 miles southwest of downtown Portland. Founded in 1888, it is the oldest zoo west of the Mississippi River. The 64-acre zoo is owned by the regional Metro government.