Metropolitan Lima covers , of which (31%) comprise the actual city and (69%) the city outskirts. The urban area extends around from north to south and around from west to east. The city center is located inland at the shore of the Rímac River, a vital resource for the city, since it carries what will become drinking water for its inhabitants and fuels the hydroelectric dams that provide electricity to the area. While no official administrative definition for the city exists, it is usually considered to be composed of the central 30 of 43 districts of Lima Province, corresponding to an urban area centered around the historic Cercado de Lima district. The city is the core of the Lima Metro Area, one of the ten largest metro areas in the Americas. Lima is the world's third largest desert city, after Karachi, Pakistan, and Cairo, Egypt.
Metropolitan Lima covers , of which (31%) comprise the actual city and (69%) the city outskirts. The urban area extends around from north to south and around from west to east. The city center is located inland at the shore of the Rímac River, a vital resource for the city, since it carries what will become drinking water for its inhabitants and fuels the hydroelectric dams that provide electricity to the area. While no official administrative definition for the city exists, it is usually considered to be composed of the central 30 of 43 districts of Lima Province, corresponding to an urban area centered around the historic Cercado de Lima district. The city is the core of the Lima Metro Area, one of the ten largest metro areas in the Americas. Lima is the world's third largest desert city, after Karachi, Pakistan, and Cairo Egypt.