Border: Haskell Free Library and Opera House Area: 8,891 km* (total border length) Est. Gross Domestic Product: $27.36 trillion (US) / $1.928 trillion (Canada)* The Haskell Free Library and Opera House, which spans the border between Quebec, Canada, and the U.S. state of Vermont, represents a unique image of mutual understanding and collaboration between two countries. This architectural wonder, which was purposefully built on the international border in 1904, permits guests to wander freely within a shared area without ever having to exit the structure.
Border: The line separating Alcoutim, Portugal, and Sanlícar de Guadiana, Spain Area: 1,214 km (length of the entire boundary) The estimated GDP is $1.582 trillion for Spain and $276.432 billion for Portugal. The zipline that whisks adventure seekers from Sanlúcar de Guadiana in Spain to Alcoutim in Portugal is an exciting variation on international travel that can be found near the border between Spain and Portugal. Known as Limitezero, this unusual means of transit represents the cordial relations between these two countries in addition to offering a fresh approach to crossing borders.
