The Interior Lowlands are a lowland region in the central United States. The are is located between the Appalachian Mountains to the east and the Great Plains to the west. The Interior Lowlands are made up of several smaller physiographic regions, including the Mississippi Alluvial Plain, the Ozark Plateau, and the Nashville Basin.
Death Valley is located in the Mojave Desert, which is in the southwestern United States. The Mojave Desert is a part of the Basin and Range Province, which is a region characterized by alternating mountain ranges and desert basins. Death Valley is located in a basin between the Panamint and Amargosa mountain ranges.