Lake Mead National Recreational Area
Lake Mead National Recreational Area - The concrete used to construct Hoover Dam was transported to the dam over these tracks.
Lake Mead National Recreational Area - Three of America's four desert ecosystems--the Mojave, the Great Basin, and the Sonoran Deserts--meet here. As a result, this seemingly barren area contains a surprising variety of plants and animals, some of which may be found nowhere else in the world.
