The Bering Strait is the body of water that separates Alaska from the Asian continent. The distance across the strait from the United States to Russia is 58 miles.
The boundary between the United States and Russia is located in the middle of the Bering Strait, at the site of the Big and Little Diomedes islands. Archaeologists believe that during the last Ice Age, the two continents were connected by a land bridge that eroded over time due to strong seas and winds. While there has been discussion of connecting the two continents again via bridges or tunnels, the expense and weather conditions make such a connection difficult.