1: Its remote location. Machu Picchu is located in a remote area of the Andes Mountains, about 2,400 meters (7,900 feet) above sea level. This made it difficult for the Spanish conquistadors to find and conquer it, and it remained hidden from the outside world for centuries.
2: Its construction. Machu Picchu was built by the Inca people in the 15th century, and its construction is a marvel of engineering. The city is made up of thousands of stone buildings, which were built without the use of wheels or draft animals. The stones are fitted together so precisely that they do not require any mortar.
3: Its purpose. The purpose of Machu Picchu is still not fully understood. It is thought that it may have been a royal estate, a religious center, or a military stronghold. However, there is no conclusive evidence to support any of these theories.
4: Its abandonment. Machu Picchu was abandoned by the Inca people around the time of the Spanish conquest. The reasons for this are also unknown, but it is thought that it may have been due to an epidemic, a war, or a natural disaster.
5: Its rediscovery Machu Picchu was rediscovered by a Peruvian farmer named Hiram Bingham in 1911. Bingham was a professor at Yale University, and he led an expedition to the region in search of the lost city of Vilcabamba. He was amazed to find Machu Picchu, and he spent the rest of his life studying and promoting it.