US-730, Wallula, WA
National Natural Landmark designated in 1980
Photo taken by Richard Doody in 2008
Wallula Gap is the largest, most spectacular, and most significant of the several large water gaps through basalt anticlines in the Columbia River basin. It was designated a National Natural Landmark by the US National Park Service in 1980.
- February 8, 2019: New photos from Richard Doody
- February 8, 2019: Added by Richard Doody