Iconic Machu Picchu is the most famous and best preserved Incan site of the Andean region.  It sits on a mountain ridge above the Urubamba Valley near Cusco, some 2,430 metres (7,970 ft) above sea level.  In 1983 it was declared a UNESCO World Heritage Site and it is the biggest tourist attraction in Peru. It has become so popular that the Peruvian government has had to limit visitors to 2,500 per day in order to help preserve the site. Read more about Machu Picchu here.