hadrians wall at peel gap with landscape of north pennines hills and crag lough, northumberland national park, england

ancient archaeological archaeology architecture attraction autumn border borders britain britannia britannicus british britons building cliffs clouds craghday empire england europe excavation fortification foundations frontiers gap garrison grass grassy great hadrian hadriani hadrians heritage hiking hills history isles kingdom landscape limes lough low masonry national nature northern northumberland park path peel pennines picts point remains rocky roman rome site steep stormy strategically structure sycamore tourist trail travel unesco united vallum wall west western world north crag hadrian`s follows height land britain