A hexagonal Type 22 pillbox, a British hardened field defence from World War II, located near Portwrinkle in Cornwall, England. This concrete structure was part of the UK's anti-invasion preparations, designed to provide defensive positions with loopholes for small arms fire. The pillbox is camouflaged and built into the landscape, typical of the thousands constructed along Britain's coastline during the war.
Such structures formed part of a wider network of coastal defences intended to repel potential German landings during the conflict.