A site used over a number of ages including the Mesolithic (approx. 8000-4000BC), Iron Age (approx. 500BC-500AD) and Viking (approx.800-1100AD) periods. The site shows evidence of both domestic and defensive occupation and overlooks an inlet, perhaps providing a deterrent against invaders or raiders. The Viking promontory fort is now eroded to much less than its original size but may once have contained a roundhouse and defensive palisade walls. 200m south of the fort, similar erosion has revealed Mesolithic stone tools, a hearth and artefacts suggesting it was used as a temporary camp for hunter-gatherers around 5700BC. Many of the finds from the site can be seen in the Manx Museum.