Explore 21,000 km of History

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Limes Germanicus

Rome's 550-km German frontier — from the Rhine to the Danube.

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Sycamore Gap (Hadrian's Wall)

The most photographed tree in England, standing in Hadrian's Wall.

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Vindolanda (Hadrian's Wall)

Home of Britain's oldest handwritten documents — the Vindolanda tablets.

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Antonine Wall

Rome's most northern frontier — a 39-mile turf wall in Scotland.

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Hadrian's Wall

Rome's northwest frontier — 73 miles of stone across northern England.

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Zijingguan Pass

One of the 'Three Inner Passes' guarding Beijing's mountain route.

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Xifengkou Pass

The 'Underwater Great Wall' — a Ming pass submerged by a reservoir.

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Niangziguan Pass

The 'Lady's Pass' — defended by Princess Pingyang's women's army.

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