March 13, 2012

Black Hole of Calcutta, Australia

Photograph by Carsten Peter, National Geographic

This Month in Photo of the Day: National Geographic Magazine Features

"It feels like being swallowed by the Earth," says photographer Carsten Peter of the Black Hole of Calcutta in Claustral Canyon. Experienced canyoneers avoid it after heavy rains.

See more pictures from the October 2011 feature story "Deep Down Under."

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