The Southwest differs from the adjoining Midwest in weather (drier), population (less dense), and ethnicity (strong Spanish-American and Native-American components). Outside the cities, the region is a land of open spaces, much of which is desert. The magnificent Grand Canyon is located in this region, as is Monument Valley, the starkly beautiful backdrop for many western movies.Texas, one of the four states in the Southwest, is the second largest state, second to Alaska.