Machu Picchu was built by the Inca Empire around 1450 in Peru. It is located 2430 metres (7970 feet) above the sea level on a point between the Huayna Picchu and Machu Picchu mountains in Peru. It has beautiful, polished dry-stone walls of granite stone. American explorer Hiram Bingham III re-discovered Machu Picchu in 1911. In 1983, Machu Picchu became a UNESCO World Heritage Site. In 2007, it was voted as one of the New Seven Wonders of the World.