Quinault Rain Forest

The Quinault Valley catches an average of seventeen feet of rain a year, which explains everything. That water built a forest holding world records for western red cedar, Sitka spruce, western hemlock, Alaskan cedar, and mountain hemlock — plus five of the ten largest Douglas-firs on earth. Wikipedia notes it may be the greatest concentration of record-size giant tree species in the smallest area anywhere on the planet, with the largest trees outside California and New Zealand. The glacier-carved valley ends at Lake Quinault. Start at the ranger station and walk from there.