Australia's Great Barrier Reef is 1,250 miles long!
45
A waterfall known as The Devil's Kettle empties water into a hole and nobody knows where it ends up!
18
More than 25% of the world's forests are in Siberia.
51
More than a dozen men have stood on the surface of the moon, but only three have been to Challenger Deep in the Marianas Trench, the deepest known spot in the ocean.
17
The Niagara Falls moves upstream at an average rate of about 295ft a century!
48
The warmest temperature ever recorded on Antarctica was 3 degrees F.
175
The average ice berg weighs 20,000,000 tons!
54