standing on the rim of the grand canyon looking down on the colorado river.

rock wilderness plant geology mountain tree trail nature landscape ridge valley terrain plateau cliff grand canyon rim national park colorado river • rocks • glen • gulch gorge ravine gully scenery tourist tourism hiking camping horseback riding park kaibab forest canyon–parashant monument hualapai indian reservation havasupai reservation navajo nation surrounding baaj nwaavjo #39aph39#tah kukveni ancestral monument president theodore roosevelt preservation scenery earth#39aph39#s geological history tributaries channels layer uplifted geologists down-cutting retreat cliffs deepening widening canyon inhabited native americans settlements caves pueblo viewed garcía lópez cárdenas