Promontory fort

Promontory forts are coastal defensive structures built above steep cliffs, often connected to mainland only by a narrow neck of land, reducing the ramparts needed. Most date to the Iron Age and appear across Ireland, the Orkney Islands, the Isle of Man and Cornwall. In County Kerry, Dunbeg fort sits below Mount Eagle on the Dingle Peninsula and may have originated in the Bronze Age, later containing an early medieval corbelled stone hut. The sea did half the work of building the fortress, leaving human hands to finish what the cliff began.