TwistedSifter In the city of Iquique, in northern Chile, lies a 20,000-year-old sand dune that was originally formed by coastal winds when the sea level was once 100 meters further inland.
Dubbed Cerro Dragón (‘Dragon Dune’), it measures 6.4 km (4 mi.) long, Read more ... 320 m (350 yd) high and ranges between 150 and 500 m (160-600 yd) wide