Oregon Zoo

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. It currently holds more than 1,800 animals of more than 230 species, including 19 endangered species and 9 threatened species. The zoo also boasts an extensive plant collection throughout its animal exhibits and specialized gardens. The zoo also operates and maintains the 2 ft 6 in narrow gauge Washington Park & Zoo Railway that previously connected to the International Rose Test Garden inside the park, but currently runs only within the zoo.

The Oregon Zoo is Oregon's largest paid and arguably most popular visitor attraction, with more than 1.7 million visitors in 2018.

Source: Wikipedia