A waterfall known as The Devil's Kettle empties water into a hole and nobody knows where it ends up!
18
10 of the tributaries flowing into the Amazon river are as big as the Mississippi river.
41
If Antarctica's ice sheets melted, the worlds oceans would rise by 60 to 65 metres (200 - 210ft) - everywhere
181
One cubic mile of seawater contains about 50 pounds of gold.
79
The city of Houston, Texas is built on a swamp and is slowly sinking!
89
Check your map! The Pacific entrance of the Panama Canal is farther East than the Atlantic entrance.
40
Check your map! Virginia extends farther west than West Virginia.
67
The 'King Ranch' in Texas is bigger than the state of Rhode Island.
49