National Geographic Travelのインスタグラム(natgeotravel) - 6月22日 04時19分

Photo by George Steinmetz @geosteinmetz | Swipe right to see visitors to Yellowstone National Park stroll along a boardwalk near the edge of Grand Prismatic Pool, a natural hot spring. At the center of the pool is 93°C mineral water, which cools as it nears the edges of the pool. The different colors are caused by bacteria that live in different temperatures of water. To view more of our earth from above, follow me, @geosteinmetz.

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