clipped from: www.oddee.com 
Dry Valleys (Antartica)
Socotra Island (Indian Ocean)
Rio Tinto (Spain)
Kliluk, the Spotted Lake (Canada)
Salar de Uyuni (Bolivia)
Vale da Lua (Brazil)
Blood Pond Hot Spring (Japan)
The Stone Forest (China)
The Richat Structure (Mauritania)
Eisriesenwelt Ice Caves (Austria)