Just south of the Rhododendron Garden  is Pacific Rim Bonsai Collection (253/924-5206, www.weyerhaeuser.com/bonsai , free), operated by the Weyerhaeuser Corporation; corporate headquarters is just up the way. The collection contains more than 90 bonsai trees, some more than 500 years old. Go 0.75 mile east from exit 142A, then a half mile north on Weyerhaeuser Way. (By the way, the correct pronunciation for bonsai—Japanese for a tree in a pot—is bone-sigh.) Hours are the same as the rhododendron garden. Lectures on growing bonsai trees are held April–September throughout the year.