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'Gateway to Hell': Sinkholes Open Across Earth

A look at some of the most astonishing sinkholes which have turned up around the world.
Image: Fire Truck Trapped In Giant Sinkhole
A 22-ton Los Angeles Fire Department fire truck protrudes from a sinkhole on Sept. 8, 2009 in the Valley Village neighborhood of Los Angeles, Calif.David McNew / Getty Images file