Since it was found by the North American explorer Hiram Bingham in 1911, it has not stopped to surprise the world. The archeologists believe it was built in the second half of the 15th century, but the function of it is still a mystery. It has been proved that many people lived there, but only important people as noblemen, priests and nuns. After the Spanish conquest, the Incas fled and abandoned the citadel, and nobody else heard about it, not even the Spaniards who never got there.

The citadel is divided in 3 areas, two neighborhoods, and an agricultural sector, that is a vast network of terraces and channels for its irrigation. The urban sector is divided in 2 neighborhoods, in one of it are many temples, ritual chambers and also the royal bedroom. In the second one are many houses for the noblemen and their servants. Between both neighborhoods is a big plaza.

The sceneries are outstanding, the citadel was built on top of a hill and it's surrounded by big mountains. At feet of the mountains flows the Urubamba river, and the sound of its water can be hear all around the citadel.

Perhaps the main attraction of the citadel is the degree of technology that its builders achieved in stone work. The joins between the stones in some of its buildings are so snug that it’s impossible to insert even the tip of a needle between them. The most fascinating stone is the "Intihuatana" (hitching post of the sun), which served as an astronomical calendar. Nevertheless, more interesting is the energy and peace you feel when you get in this mysterious place.