Whitman Mission National Historic Site - The 1847 Whitman "Massacre" horrified Americans and impacted the lives of the peoples of the Columbia Plateau for decades afterwards. See under Walla Walla#Get out.
Daroga State Park, on Lake Ential, 6 miles north of Orondo
Palouse Falls State Park, 23 miles southeast of Washtucna
The Gorge Amphitheatre, 754 Silica Road N.W., ☎ +1-206.628.0888, . A 20,000 seat outdoor concert venue, located just off I-90, in the charmingly-named tiny town of "George, Washington". Beautiful sunsets.
Columbia River Gorge National Scenic Area, (Located off Interstate 84 or on the Historic Columbia River Highway, Oregon Highway 30), ☎ +1-(503) 695-2372, . The Columbia River cuts through the Cascade Mountains in this gorge, many km long. The Multnomah Falls are a particular attraction.
Doug's Beach State Park, (On SR 14 about 5 km (3 miles) east of Lyle), . 06:30h to dusk (summer), 08:00h to dusk (winter), open year-round. A day-use park on the Columbia River, a great location for windsurfing. Between Murdock and Lyle.
Columbia Hills State Park, (On State Route 14 at milepost 85, 9 miles west of Wishram), . 06:30 h to dusk, April 1 - October 31. A park on the Columbia River's north bank, under Horsethief Butte. A short ways north-east of The Dalles, Oregon. Previously known as Horsethief Falls State Park.
The Columbia River Plateau region consists of Adams, Benton, Douglas, Franklin, Grant, Klickitat, Lincoln, Walla Walla, and Yakima Counties.
Umatilla National Wildlife Refuge, a 14,000-acre wildlife refuge straddling the Columbia River in Washington and Oregon. Entry points are in Irrigon, Oregon, and off Highway 14 in Washington
US Dept of Energy Hanford Site Test Facility. One of the major nuclear weapons production sites in the United States Tours happen six times a year and depart from Richland.
Crown Point Overlook State Park, (From state route 155 in Grand Coulee, take the turnoff to Bridgeport (state Route 174), drive two miles north, look for a sign 'Crown Point Vista'). The best spot for viewing the Grand Coulee Dam.