Aerial image of Housesteads Roman Fort of Vercovicium, an auxiliary fort on Hadrian's Wall, UNESCO World Heritage Site, Northumberland, England, United Kingdom, Europe

Housesteads Roman Fort, Vercovicium, AD 124, Granary showing provision for underfloor heating, Hadrians Wall, UNESCO World Heritage Site, Northumbria National Park, Northumberland, England, United Kingdom, Europe

General view of the north granary, Housesteads Vercovicium, Hadrians Wall, UNESCO World Heritage Site, Northumberland, England, United Kingdom, Europe