Spain looks straightforward on a map. France sits to the north, Portugal to the west, and water surrounds almost everything else. It seems easy to understand, even though the reality is far messier.

This video explores some of the most unusual state borders in the United States and explains how history, geography, politics, and surveying errors shaped them. From river disputes to forgotten ...

From invisible boundaries to borders that cut through homes and cities, the world is full of surprising divisions. Discover some of the most interesting and unusual international borders and the ...