Limestone Corner is an area of Hadrian's Wall (and associated defences) at its most northerly point,[1] in present-day northern England.

[2] Other notable features at Limestone Corner are the wall ditch at this point, which was never completely excavated, a Roman camp and the site of Milecastle 30.

[5] Moving west along the escarpment, a glacial surface drift of boulder clay begins to overlay the whinstone.

A short distance west of this point, significant whinstone blocks remain in the ditch, with others deposited on its northern lip.

Two iron wedges were discovered within the wall core at Milecastle 26, consisting of steel-faced tips, and soft heads for hammering.

There are occasional large whinstone rocks present on the north and south berms, having been cut from the vallum ditch and deposited whole.

Although a farmstead (now consisting only of a series of banks) was later built within the camp, the rampart, ditch, all four gateways (one in the middle of each side) and traverses remain visible.

[3] The foundations of several interior buildings are present, which may point to the camp being occupied for more than a single campaign season.

[8] Flush brackets were fixed to walls at 1 mile (1.6 km) intervals between Fundamental Benchmarks, and also on trig pillars.

The nearest parking is at Brocolitia Roman fort (also known as Carrawburgh) 1.5 kilometres (0.93 mi) to the west, from where the Hadrian's Wall Path can be accessed.