Twenty percent of the world’s fresh water is in a single lake, Russia’s Lake Baikal.

Its surface is smaller than Lake Superior — but it’s a mile deep.

Only 17 countries are larger than Alaska.

If you’re an extrovert, you’ll be happiest (in principle) in northeastern Pakistan. That’s the world center of population — from there, the average distance to every human on earth is only 3,200 miles.

Conversely, if you’re an introvert you should visit Easter Island, where you’ll be 9,300 miles from the average fellow man.

See also Point Nemo and Vroom!

Hawaii is the only U.S. state whose boundary contains no straight line.

Amsterdam, Antwerp, Athens, Berlin, Cairo, Dresden, Dublin, Geneva, Lisbon, London, Marseilles, Milan, Moscow, Rome, Seville, Toronto, and Warsaw … are all towns in Ohio.

What’s the most remote capital city in the world?

It’s a tie: Canberra, Australia, and Wellington, New Zealand, are 1,448 miles … from each other.

Wyoming is the least populous state.

The trouble with rocket-powered roller skates is that you can’t steer.

To remain on land as long as possible, we suggest you start in northern Siberia (99°1’30E 76°13’6N) and point yourself due south. That’ll take you through 4,717 miles of Russia, Mongolia, China, Burma, and Thailand before you splash into the South China Sea.

Or start at 48°24’53N 4°47’44W in northern France and head east. An unswerving course will take you through Europe, Ukraine, Russia, Kazakhstan, Mongolia, China, and Russia, covering 6,665 miles before you hit the Sea of Okhotsk. Good luck.

See also Point Nemo.