The Japanese gardens are in Seattle..not too far from Kent. http://www.seattle.gov/parks/parkspa...nesegarden.htm

and the Kubota gardens http://www.seattle.gov/PARKS/park_detail.asp?ID=415

I think Pt. Defiance in Tacoma has some good opportunities too.
http://www.metroparkstacoma.org/page.php?id=24

What kind of surroundings are you looking for?