When you see a bright red river or a lake that glows a vivid green color, you probably think it belongs on another planet. But these incredibly striking bodies of water are right here on Earth. Here are the most beautiful and alien-looking rivers and lakes, sporting bizarre colors.

These travertine pools at Pamukkale, Turkey, have an unearthly color and form because of the calcium carbonate-rich mineral springs

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(via Pvasiliadis, Ana Raquel S. Hernandes and smush12)

The Betsiboka river in Madagascar, 2005

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(Photo by oledoe (cc))

The meanders of Uvac, an international river that flows through Serbia and Bosnia and Herzegovina

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(via Zeleniaktivista)

Huanghe River in Lanzhou, October 2006. A sewage pipeline released some red dye into the river, which caused the extraordinary color.

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(via Chinadaily)

The Grand Prismatic Spring in Yellowstone National Park, Wyoming, colored by some pigmented bacteria

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(via Wikimedia Commons)

Lake Hillier, Middle Island, Recherche Archipelago, Western Australia

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Odeleite, Portugal, also known as The Blue Dragon River

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(via Imgur)

A river in Xinmeizhou Village, Zheijang Province, China, turned red overnight in July 25, 2014, because somebody dumped artificial coloring in the water

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(via Equatoria Sun)

Pumpkin Spring, a natural formed hot arsenic spring in Grand Canyon

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(via Alan English)

These rivers full with volcanic ash in Iceland, photos by Andre Ermolaev

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(via Andre Ermolaev)

Green Crater Lake, Costa Rica, at the summit of the Iraz√ļ volcano, colored by mineral byproducts of the active volcano

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(via Adam and Heidi Frank)

Daqubang and Baiyang rivers in China, which have turned yellow because they have been seriously polluted by some local factories

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(via Chinawhisper)

Three coloured lakes on Mount Kelimutu, Kelimutu National Park, Flores, Indonesia

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(via Wikimedia Commons and GalleryHip)

Ca√Īo Cristales River, also known as "The River of Five Colors", Colombia. Its color comes from various plants.

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(Image by Mario Carvajal (cc))

The Marble Canyon, a section of Colorado River that marks the beginning of the Grand Canyon

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(via Joseph McCarty)

Lake Retba (also known as Lac Rose), northwest Senegal, colored to pink by a bacteria named Dunaliella salina

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(via ritaince claire and Jeff Attaway)