El Paso (TX)

While the other major cities all are located in the east, El Paso, the sixth largest city in Texas, is located in the far west of this huge state. Together with its Mexican sister city Ciudad Juárez, twice as big and only separated by the Rio Grande, it forms a mostly Spanish metropolitan area. While downtown is of little interest for tourists, the historic missions out of town are worth visiting as they are an important part of the Spanish-Mexican heritage.