Huayna Picchu
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Huayna Picchu or Wayna Picchu (Quechua: "Young Peak") is a mountain in Peru around which the Urubamba River bends. It rises over Machu Picchu, the so-called "lost city of the Incas," and divides it into sections. The Incas built a trail up the side of the Huayna Picchu and built temples and terraces on its top.
The Temple of the Moon is located on the mountain.
The peak of Huayna Picchu is about 2720m above sea level, or about 360m higher than Machu Picchu.
[edit] Visiting
Not really a separate visit per se; you must walk through Machu Picchu towards Wayna Picchu. A guard at a sign in desk will ask you to sign in. As of Nov 2006, you must sign in by 1pm to start the trail. Only 400 visitors are allowed to enter this trail each day. The trail itself forks to several points of interest, but if the summit of Wayna Picchu is what you seek, follow the appropriate signs marked "Wayna Picchu". The climb is steep and takes about 1 hour, usually less (one way). Some portions are slippery and steel ropes provide some support. Decent hiking boots are important. There is an extremely narrow passage near the summit that will force you to crawl, so be prepared to get your hands and clothes dirty as it's likely to be muddy (and you might scrape some skin on the rocks). There is an alternate route that will avoid this passage, but it's not marked as such. When you reach the first of the ruins, there is a sign whith one arrow which points to the right that says "Wayna Picchu". The other arrow points down hill and says "return". Going uphill along the steep narrow stairs following this return route will lead you to the summit without having to go through the low and narrow crawl space mentioned.