Mt. Aconcagua, South America's highest peak Mt. Aconcagua towers over the Andes at 22,840'. The name means "Stone Sentinel" in Quechua, a Native American dialect. It is the highest point outside of Asia - one of the 7 highest summits in the world.

Today it is topped by a spectacular lenticular cloud. Clouds like this are typical in windy parts of the world like Chile. Or perhaps a flying saucer is landing on Aconcagua!

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