The Antonine Wall was a turf fortification on stone foundations, built by the Romans across what is now the Central Belt of Scotland, between the Firth of Clyde and the Firth of Forth. Built some twenty years after Hadrian's Wall to the south, and intended to supersede it, while it was garrisoned it was the northernmost frontier barrier of the Roman Empire. It spanned approximately 63 kilometres and was about 3 metres high and 5 metres wide.
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Official website http://www.antoninewall.org/
Address Callendar House, Callendar Park, FK1 1YR Falkirk, UK
Coordinates 55°59'37.928" N -3°45'59.044" E