A collection of our favourite geo-thermal pools & other water-based natural wonders from around the world. The colours are incredibly striking, and usually reveal the water’s elemental content. New Zealand’s Wai-O-Tapu thermal area displays a dazzling array of colours that sit in stark contrast to the rugged natural geography surrounding them.

  • White –Silica
  • Pale blue – Pale blue bodies of water are actually white, the tint comes from silica reflecting sunlight
  • Green – Colloidal sulphur/ferrous salts
  • Orange – Antimony
  • Purple – Manganese oxide
  • Yellow – Sulphur
  • Red-Brown – Iron oxide
  • Black – Sulphur and Carbon

 

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Pamukkale, Turkey. The name means ‘cotton castle’ in Turkish. Image via Tourradar.

 

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Pool in the Seljavallalaug Valley, Iceland. Image via Erica Davidge.

 

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Kusatsu Shirane-san (草津白根山), Gunma, Japan. Image via Jeepney Jinggoy.

 

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Blue Lagoon (Bláa lónið), Iceland. Image via Jess Moss.

 

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Images of the Wai o Tapu thermal pools in Rotorua, New Zealand. Images via Getty.

 

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Terme di Petriolo, Monticiano, Italy. Image via Fattoria Maremmana.

 

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The Dallol volcanic crater, Ethiopia. Image via Adelaporte.