Machu Picchu was an ancient city in the Andes Mountains, A group of people called the Incas built Machu Picchu a long time ago. The Inca civilization lasted from around 1100 A,D. until about 1500 A.D. When it suddenly ended, few people knew about the city of Machu Picchu. Because of this, it is sometimes called the “Lost City of the lncas”. In 1911, an American explorer found Machu Picchu. Since then, many people have visited Machu Picchu to climb the ruins of the city.