| Location, Year Built, Length | Wall | Built By| to Defend Against |
| China, 5th century BCE, 8,851.8 km | |
| Between Athens and Piraeus, 5th century BCE, 10 km | |
| Iran, 6th century BCE, 195 km | |
| West Bank, 8000 BCE, 4 km | |
| Moscow, 12th century, 2 km | |
| Manila, 16th century, 16 km | |
| Rome, 271, 19 km | |
| Romania, 10th century, 126 km | |
| Israel, 11th century BCE, 4.5 km | |
| | Location, Year Built, Length | Wall | Built By| to Defend Against |
| Croatia, 14th century, 7km | |
| Coast of Europe, 1942, Varied | |
| Germany, 1961, 107 km | |
| Sweden, 13th century, 3.5 km | |
| Ukraine, 2nd century BCE- 7th century CE, 1,000 km | |
| English-Scottish Border, 122 CE, 117 km | |
| Turkey, 5th century, 56 km | |
| Istanbul, 4th centruy, 2.8 km | |
| Good guess, but no | |
| These aren't the walls described, but you get credit for knowing something | |
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