Machu Picchu is an archaeological site located in Peru, on top of a mountain in the Andes at about 2,400 meters above sea level. It was built by the Inca civilization in the 15th century and is considered one of the wonders of the world. It is known for its impressive stone structures, including temples, agricultural terraces, houses and a water supply system. Machu Picchu was abandoned by the Incas after the arrival of the Spanish conquistadors and remained largely unknown until its discovery in 1911. Today it is a major tourist destination and a sacred site for Peruvians and Andean peoples.