Hadrian's wall

Aesica (with the modern name of Great Chesters) was a Roman fort, one and a half miles north of the small town of Haltwhistle in Northumberland, England. It was the ninth fort on Hadrian's Wall, between Vercovicium (Housesteads) to the east and Magnis (Carvoran) to the west. Its purpose was to guard the Caw Gap, where the Haltwhistle Burn crosses the Wall.

Milecastle 42 (Cawfields) is a milecastle on Hadrian's Wall (grid reference NY7157466692).

Alloa Lea Quarry Cave is a short cave in the Five Yard Limestone of the Alston Block in Northumberland, England. It is situated in an old quarry on the road between Alloa Lea and Walltown.The total length of the cave is 10m.

Allolee to Walltown is the name given to a Site of Special Scientific Interest (SSSI) in Northumberland, England. The site, which follows the path of a section of Hadrian's Wall, is notable for an unusually wide range of grassland types growing on thin soil above the Whin Sill, a rock formation peculiar to the Northern Pennines.

Milecastle 45 (Walltown) was a milecastle on Hadrian's Wall (grid reference NY67716657).

Milecastle 44 (Allolee) was a milecastle on Hadrian's Wall (grid reference NY68886694).

Milecastle 43 (Great Chesters) was a milecastle on Hadrian's Wall (grid reference NY70356684). It was obliterated when the fort at Great Chesters (Aesica) was built.