Machu Picchu is 2400m (7800ft) above sea level,
and it nessles on a ridge between Machu Picchu mountain and the sugar loaf
of Huayna Picchu.
Rediscovered by Hiram Bingham in 1911, this lost
city of the Inca's has cause many a debate amounst scholars since it's rediscover.
A current theory was that it was a giant observatory since recently it was
discovered that at dawn on the winter solstice (21st June) the sun shines
through the middle of the window in the Torreon, casting a shadow. This
is just one of many buildings built with a view of the heavens.