Top 5 Largest Active Sand Dunes

Located in Merzouga, Morocco, these vast sand dunes stretch over 25 kilometers (15.5 miles) long and up to 180 meters (590 feet) high. The Erg Chebbi dunes are part of the Sahara Desert's largest dune field. The area was once a major stop for ancient travelers on the famous Silk Road trade route, and today it is a popular destination for desert treks and camping expeditions. The sand dunes are composed of fine-grained quartz sand and have been shaped by wind and water erosion over millions of years. In 1989, UNESCO designated Erg Chebbi as part of the Sahara Desert's natural heritage, recognizing its cultural and environmental significance.

Situated in southern Colorado, USA, this national monument covers approximately 30 square miles (78 square kilometers) with towering sand dunes that reach heights of up to 750 feet (229 meters). The Great Sand Dunes are the result of erosion caused by strong winds over thousands of years, which have sculpted these massive dunes. The area is popular for hiking and climbing, with several trails that offer panoramic views of the surrounding landscape. In 2011, a severe sandstorm buried parts of the national monument under over 3 million cubic meters (660 million board feet) of sand. Visitors can explore the dunes in summer months, when conditions are safe.

Located in western Australia, these vast sand dunes stretch across approximately 140,000 square kilometers (54,100 square miles), making them one of the largest sand dune systems globally. The Great Victoria Desert is a dry and arid region with extreme temperature fluctuations, averaging an annual rainfall of only 25 centimeters (9.8 inches). Visitors can explore this vast expanse by air or from specially designed 4WD vehicles that traverse over sand ridges. Archaeological evidence suggests human presence in the area dates back at least 2,000 years. The dunes are a testament to the region's complex geological history.

Situated in the Altai Mountains of Russia and Mongolia, this vast sand dune stretches for approximately 200 kilometers (124 miles) along the Russian-Mongolian border. The Khui Sand Dune is part of the Khangai Range and experiences significant temperature fluctuations throughout the year, with hot summers and cold winters. Climbers can tackle the mountain using various routes, including snow and ice-covered peaks. Local legend tells of a buried treasure hidden beneath the dune's highest peak, adding to its mystique. The sand dunes are also home to several rare plant species adapted to these harsh conditions.

Located in Almería, Spain, this vast desert region covers approximately 2,700 acres (1,100 hectares) with towering sand dunes that reach heights of up to 600 meters (1,969 feet). The area was created by the construction of a large reservoir for hydroelectric power plants and has since become an important site for film and television production due to its unique desert landscape. Visitors can enjoy hiking trails within this surreal environment, explore traditional villages nearby, or visit natural landmarks like the "Molino del Diablo" windmill. The dunes create a dramatic backdrop for many films and TV shows, including Lawrence of Arabia.