The city of Houston, Texas is built on a swamp and is slowly sinking!
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The Niagara Falls moves upstream at an average rate of about 295ft a century!
48
The Dallas/Ft. Worth airport is larger than New York City's Manhattan Island.
62
Europe is the only continent without a desert.
62
An earthquake on Dec. 16, 1811 caused parts of the Mississippi River to flow backwards.
243
It takes a drop of ocean water more than 1,000 years to circulate around the world.
61