Sand dunes shift over time in a section of Brazil’s Lençóis Maranhenses National Park. Sand is carried to the park from the interior of the country by the Parnaíba and Preguiças rivers, where it is then driven back inland by coastal winds that blow up to 50 kilometers (31 miles) per hour. The tallest dunes in the park rise to heights of 40 meters (130 feet).
-2.533333°, -43.116667°
Source imagery: Google Timelapse / Planet
Lençóis Maranhenses National Park