The Berlin Wall was a guarded concrete barrier that physically and ideologically divided Berlin from 1961 to 1989.
The Stelling van Amsterdam was the most advanced military structure of its type in the world – 135 km (84 miles) of forts, batteries and moats completely encircling the city in a defensive barrier.
Unlike other notorious barriers in the world, the Moroccan Wall is rarely in the news and is little discussed outside of Africa. The existence of this wall has been buried in the desert, along with the 40-year-old plight of the Sahrawi people the Moroccan Wall has kept divided.
About twenty kilometers from the city of Boulogne-sur-Mer, near the hamlet of Mimoyecques, in northern France, lies a once-secret underground Nazi base.
Juragua Nuclear Power Plant was a nuclear power plant under construction in Cuba when a suspension of construction was announced in 1992 following the collapse of the Soviet Union and the termination of Soviet economic aid to Cuba.
Equihen Plage, on the coast of northern France by the English Channel, is a small seaside village with a population of about 3,000.
The mountain, known as one of the Seven Wonders of Dauphiné, is a relatively flat limestone mesa (a table shaped elevated area of land) surrounded by steep cliffs