Machu Picchu is one of the seven man-made wonders of the world. Seeing the Inca Empire ruins in person is literally jaw-dropping.
Machu PIcchu was used exclusively as a royal retreat. Most of the time the Inca Emperor was busy in Cusco. When he wanted a vacation, he and his entourage came here. The Machu Picchu site was staffed all year long in anticipation of a royal visit at any time.