two treesw on a hill above once brewed on hadrian`s wall walk

039 archaeology attraction background blue border countryside crags english evening fortification hadrian hadrians haltwhistle heritage hike hiker hills historic housesteads landmark landscape milecastle monument national north northern northumberland outdoors park path pennine rambler rambling rigg roman ruin scene sill steel sunlight sunset tourism unesco vallum vindolanda visitor walking wall walltown way whin world