What is a pre-Columbian Inca site located 2,430 metres (7,970 ft) above sea level, on a ridge above the Urubamba Valley in Peru?
The ans is - Machu Picchu
Concentric circles on the sea floor near Japan, about 2 m (7 ft) in diameter with intricate ridged radial lines and valleys of sand, are what?
Why is water near La Rinconada in the Peruvian Andes, at 5,100 m above sea level the highest permanent settlement in the world, contaminated?
