Image by Danielle D. Hughson Getty Images
Abutting the more manicured Washington Park to the south (to which it is linked by various trails) is the far wilder 5100-acre Forest Park, a temperate rainforest that harbors plants and animals and hosts an avid hiking fraternity. The Portland Audubon Society maintains a bookstore, a wildlife-rehabilitation center and 4.5 miles of trails within its Forest Park sanctuary.
The main sight in the park is Pittock Mansion, a grand mansion built in 1914 by Henry Pittock, who revitalized the Portland-based Oregonian newspaper. It's worth visiting the (free) grounds just to check out the spectacular views – bring a picnic.