Where one country ends and another begins is sometimes a thin line on a map and sometimes a frontier thousands of kilometres long. The longest land borders on Earth stretch across deserts, mountains and rivers, shaping trade, migration and history. Here is how the ten longest rank. Rank Border Length 1 Canada – United States 8,893 km (5,525...
When nature threatens cities and coastlines, people respond by building on a colossal scale. Storm barriers, sea walls and flood gates rank among the largest structures ever made, holding back oceans and rivers. Here are ten of the most incredible man-made barriers in the world. Building a barrier to protect oneself and one’s interests is...
Many cities around the world are still protected by the old city walls built centuries ago. Though not much of a defense mechanism today, these walls are kept as a remembrance of the past and often they serve as a tourists attraction. If you’ve ever been to such a city, you know there’s nothing like walking around or on the walls of an...
For as long as there have been cities, people have built walls around them, for defence, for control, and sometimes simply to divide. A few of these walls have outlived the empires that raised them and become world-famous landmarks. Here are ten of the most famous walls in the world. 1. The Great Wall Of China, China Built in the 14th century, the...
