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
Pamukkale, Turkey. The name means ‘cotton castle’ in Turkish. Image via Tourradar.
Pool in the Seljavallalaug Valley, Iceland. Image via Erica Davidge.
Kusatsu Shirane-san (草津白根山), Gunma, Japan. Image via Jeepney Jinggoy.
Blue Lagoon (Bláa lónið), Iceland. Image via Jess Moss.
Images of the Wai o Tapu thermal pools in Rotorua, New Zealand. Images via Getty.
Terme di Petriolo, Monticiano, Italy. Image via Fattoria Maremmana.
The Dallol volcanic crater, Ethiopia. Image via Adelaporte.