|Extreme Earth By National Geographic|
|Last Updated ( Saturday, 26 March 2011 )|
Chinstrap penguins (Pygoscelis antarctica ) ride out high surf on blue-ice
icebergs near Candlemas Island in the South Sandwich Islands .
A deep gorge drops some 650 feet (198 meters) near the abandoned city of
Araden , Crete . Visitors can descend into the gorge and walk a little more than
4 miles ( 6.4 kilometers) to the Mediterranean Sea .
A storm passes over Yellow Mounds Overlook in South Dakota 's Badlands ,
casting light and shadow below.
Towering in close symmetry, these basalt columns near Fingal's Cave form the
base of the Scottish island of Staffa .
For trees that grow on mountaintops near Cape Town , South Africa , wind can
be a magnificent sculptor.
Silhouetted by the sun, the Hand of Fatima rock formations near Hombori
village stretch toward the sky in Mali .
Erosion's force becomes clear in these limestone cliffs in Port Campbell
National Park , Australia.
Towers of salt and a riverbed colored by crystallized salt create an
otherworldly landscape in Ethiopia 's Danakil Desert .
Travertine chimneys near Lake Abbe , Djibouti , were created by hot springs
depositing calcium carbonatehe same process that creates stalactites and
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