Great Sand Dunes National Park
Great Sand Dunes National Park, Alamosa County, Colorado, USA
Great Sand Dunes National Park is located in the San Luis Valley, which is a basin of the Rio Grande Rift. The sand is derived from the deposits of ancient Lake Alamosa, which once occupied the basin. The sands are "singing sands", which produce a moaning sound when enough sand begins moving down the slip face of a dune.
Photo taken: 4 November ...
© Nathalie Brandes