Mysterious geological landmarks

Well of Barhout, Yemen: The Well of Barhout, known as the "Well of Hell," is located in the desert of Yemen's Al-Mahra province.

Sailing stones, USA: The mysterious sailing stones of the Racetrack Playa in California's Death.

Lake Hillier, Australia: Western Australia's saline Lake Hillier achieves its rose-pink.

Sunken forest of Lake Kaindy, Kazakhstan: Lake Kaindy contains dozens of trunks of submerged spruce trees to create a sunken forest.

Richat Structure, Mauritania:A prominent circular feature found in the Sahara Desert known as the Richat.

Salar de Uyuni, Bolivia: One of the most extreme and beguiling landscapes on the planet.

Moeraki boulders, New Zealand: Appearing like a wayward set of ogre's marbles, the Moeraki boulders lying along a stretch of Koekohe Beach.

Caño Cristales, Colombia: There's a river in Colombia called Caño Cristales that's commonly referred to as the "River of Five Colors.

Blood Falls, Antarctica: Located in Antarctica's remote McMurdo Dry Valleys. 

Reed Flute Cave, China: A natural limestone cavern that has formed over a period of 180 million years.

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