The color of Spain’s Rio Tinto is caused by sulfide minerals from nearby mining. NASA scientists have studied the river because similar mineral deposits might be found on Mars.
Photograph by Juan Carlos Munoz, NPL, Minden Pictures
These bubbles trapped under the frozen surface of Canada’s Abraham Lake come from methane released from plants and animals.
Photograph by Kevin Schafer, Minden Pictures
Thousands of red lotus flowers bloom each October in Lake Nong Harn in eastern Thailand.
Photograph by lkunl, Getty Images
That’s not slime! Located in the Canary Islands off the coast of western Africa, Lago Verde (which means “green lake”) is a lagoon that gets its color from algae in the water.
Photograph by Goodshoot, Getty Images
Champagne Pool in New Zealand is a hot spring that reaches 165°F (74°C). The orange ring around its edge is caused by mineral deposits in the water.
Photograph by tane-mahuta, Getty Images
Colombia’s Caño Cristales usually looks like a normal river. But between September and November, the sun causes brightly colored aquatic plants on the bottom to blossom.
Photograph by The Colombian Way Ltda, Getty Images
Jellyfish Lake in Palau, an island country near Southeast Asia, is packed with millions of golden jellyfish. The creatures swim across the lake each day, following the sun as it moves across the sky.
Photograph by Peter Verhoog, Buiten-beeld, Minden Pictures
The salty crust on the surface of Lake Natron in Tanzania, a country in Africa, gets its red color from the pigment of salt-loving microorganisms that live in the water.
Photograph by Gerry Ellis, Minden Pictures
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