MNN Galleries

The greenest parks in America

By: Tracy Alverson Euler on Oct. 16, 2009, 11:21 p.m.
skyline view of portland through the trees in a park

Photo: travelportland/Flickr

4 of 12

Washington Park

Washington Park in Portland, Ore., is green by default. After all, Portland was named one of the most eco-friendly cities in the country. With more than 400 acres of wildlife, trails and recycled art, this park won't disappoint.