Hoyt Arboretum
Non-profit greenspace located two miles from downtown Portland. Among the tree collections, the magnolias and conifers are especially renowned. Offers nature-focused instruction, and information about events and volunteering.
The Oregon Garden
Attraction in historic Silverton, featuring water features, garden art, wetlands, a rediscovery forest, a kids' garden, and a house designed by Frank Lloyd Wright. Photos, news, information about events and classes.