You can walk from the United States to Russia
Yes, really! During certain times of the year, you can travel by foot between the United States and Russia, thanks to two islands named Big and Little Diomede. Big Diomede is the easternmost part of the Russian Federation; its neighbor, Little Diomede, is a part of Alaskan territory.
When the water freezes in the winter, brave travelers can cross the short distance—about 2.4 miles—between the two islands. Do so at your own risk, though; while experts say making the journey is theoretically possible, it is dangerous and not recommended.