Machu Picchu is a city of ruins located in Cusco, Peru at an elevation of 2,400 meters above sea level that was built by the Inca Empire near 1450. It can only be accessed by train or on foot as there are no roads or airports. The city, made entirely of stone, contained temples and over 200 buildings where the Inca emperor and his family lived until it was abandoned when the Spanish conquistadors arrived.