Diomede Islands
The Big Diomede and Little Diomede, sometimes called Tomorrow Island and Yesterday Isle respectively, are the 2 islands at the border of Russia and Alaska, U.s.
The islands are about 2.4 miles apart located in the middle of the Bering Strait, separated by the International Date Line. They are called Tomorrow Island and Yesterday Isle because Big Diomede is 21 hours ahead of the small guy.
When the sale of Alaska finalized during 1867, there are families with family members on both islands. They were not allowed to cross over to see each other during the cold war.
