5 Famous Border Walls: Quick Facts

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Great Wall of China

Great Wall of China

Large crowd celebrates on and around the Berlin Wall in front of the Brandenburg Gate

A long Peace Wall in Belfast, Northern Ireland, covered with colorful political murals and graffiti, with trees lining the sidewalk and a wire fence on top of the wall.

Stone Hadrian's Wall stretches across rolling green fields with a cluster of trees in the background along the border of Scotland and England.

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fortification Castle How was the Great Wall of China made?Citadel Kremlin Parapet bastion battlement Martello tower moat alcazar