The Palouse is a farming region in Eastern Washington, north of the Snake and Clearwater Rivers, south of Spokane. The Palouse River marks the center of the area. The World Wide Fund for nature defines this ecosystem as the area east of the Big Bend region of the Colombia Plateau, north of the Umatilla mountains to the south, west of the Rocky Mountains in Idaho and south of Spokane Washington. This dune-like region has a rolling landscape with no continuous valleys or ridge lines. The hills were created by the wind rather than rivers and streams. It is one of the most productive wheat growing regions and the largest producer of lentils in the world. The Palouse is also a frequent destination for landscape artists and photographers from around the world.