The Olympic Peninsula is absolutely incredible, where else can you get beaches, mountains, waterfalls, rainforest, and beaches all in one area? Each of these sites is so unique that a weekend road trip is well worth the drive. The Olympic Peninsula is a must see addition to a Seattle vacation.
The Quinault Rainforest is a temperate rainforest in the Olympic National Forest. There are very few temperate rainforests left in the U.S. so this a great Olympic National Park site that you should definitely check out.