Alien-Looking Places on Earth

Dry Valleys (Antartica)

Antarctica's Dry Valleys, with their barren gravel-strewn floors, are said to be the most similar place on Earth to Mars. Its fascinating landscape, located within Victoria Land west of McMurdo Sound, get almost no snowfall, and except for a few steep rocks they are the only continental part of Antarctica devoid of ice. The terrain looks like something not of this Earth; the valley’s floor occasionally contains a perennially frozen lake with ice several meters thick. Under the ice, in the extremely salty water, live mysterious simple organisms, a subject of on-going research.

The Richat Structure (Mauritania)This spectacular landform in Mauritania in the southwestern part of the Sahara desert, called the Richat Structure, is so huge with a diameter of 30 miles that it is visible from space. The formation was originally thought to be caused by a meteorite impact but now geologists believe it is a product of uplift and erosion. The cause of its circular shape is still a mystery.

Rio Tinto (Spain)

The giant opencast mines of Rio Tinto create a surreal, almost lunar landscape. Its growth has consumed not only mountains and valleys but even entire villages, whose populations had to be resettled in specially built towns nearby. Named after the river which flows through the region-itself named for the reddish streaks that colour its water-Rio Tinto has become a landscape within a landscape. The river red water is highly acidic (pH 1.7—2.5) and rich in heavy metals.