Former Gun Powder Proving Yard in Hong Museum of Coastal Defence [????- ]
This is a former gunpowder proving ground at the feet of A Kung Ngam Shan. On most online maps, it was marked as a Gunpowder Factory (which is not convincing looking at the small rounded structure) or a Gunpowder Storage (also not convincing), but it should not be used in this way, as the structure is round and lacks a roof even when the wall is well maintained. Upon visit, it was marked as a Gunpowder Proving Yard, used to test gunpowder supplies to ensure that they could be used properly in combat.