A waterfall known as The Devil's Kettle empties water into a hole and nobody knows where it ends up!
18
Every year, Alaska has about 5,000 earthquakes.
31
The Caspian Sea is also classed as the world's largest lake.
52
In 1850, only 8% of the people in California were women.
0
Forest growth in the US has exceeded harvest since the 1940’s. Today, we have more trees than any time in the past 100 years.
14
The longest cave in the world is the 'Mammoth Cave System' in the USA at 560,000 mtrs deep!
63
Connecticut and Rhode Island never ratified the 18th Amendment (Prohibition).
25