Former Main Magazine

The Former Main Magazine is a 19th-century building constructed from brown tooled squared stone with grey limestone flush dressings. It features a twin-gabled north front with coped gables, grey stone quoins, and moulded corbels at the high shoulders on each side. There is one window located above lean-to porches, and the side walls have loops. The building is topped with slate roofs.

Inside, there are two brick-vaulted chambers that still have some dividing walls, showcasing high and impressive arched vaults. The surrounding wall is made of grey limestone rubble and is coped, featuring a cambered arched north doorway that is rebated for missing doors, with a datestone above. Within the enclosure, at the northeast and northwest corners, are two additional brick-vaulted chambers with stone-framed doors and windows, and quadripartite vaults.

This building is fireproof and was constructed into the excavated hillside, with an embanked path in front to protect against blasts. It served as the main magazine for the barracks. The structure is currently in poor condition.