If the weather cooperates, drive the moutain loop highway. See at Diablo Lake. See Snoqualmie Falls. Hike to Dirty Harry's Balcony. Have a Guinness at the Blarney Stone. After hours Underground Tour. Watch the sunset at Golden Gardens. Go white water rafting on the Skykomish river. Anything Mt. Rainier related. Take the train from Bellingham to Vancouver Washington and make sure to find the volunteers giving commentary about the scenery. On the east side of the state. Drive the Columbia River Gorge on the WA side. See a concert at the Gorge Ampitheater. Camp at French Cabin and visit the cafe from Northern Exposure. Eat a burger at Minor's in Yakima. Float the Yakima river on innertubes. Go wine tasting in Walla Walla. See Palouse Falls. Visit Whitman mission. See the view from the top of Steptoe Butte. Ride the gondola over Spokane falls. Grab rings from the carousel in River Front Park. Visit Manito Park, the greenhouse, and rose gardens. Mt. bike or ski at Mt. Spokane State Park. Visit Grand Coulee Dam. That should give you a start. LOL. Good luck!