The longest and hardest hike in the Sanctuario Historico Machu Picchu is up Montaña Machu Picchu, also called Cerro Machu Picchu. This towering mountain that is rarely in photographs is behind the ruins and the photogenic Huayna Picchu. Like its smaller sister, the mountain now requires and extra ticket that must be bought in advance. Most visitors to Machu Picchu only do this hike if Huayna Picchu is full, but the big mountain of the area deserves respect. Although it lacks interesting summit ruins, the hike goes through some nice cloud forest and reaches an altitude of 3080 meters, the highest in the area and, therefore, the most expansive view. The hike takes approximately four hours, but should not be missed.