Cahergall, Stone ringfort in County Kerry, Ireland.

Cahergall is a circular stone fort built with thick dry stone walls forming a compact defensive dwelling. Internal walls feature terraced levels with stone steps that create a walkable path around the interior perimeter.

Cahergall was built around the 7th century AD as a defended farmstead, a cashel of a type that survives at only a few sites in Ireland. Its name comes from the Irish cathair, meaning stone fort in some regions. The walls were later rebuilt, reaching over 4 m on the show side and about 2 m on the other.

This fort demonstrates how early medieval communities organized their farming and livestock behind defensive walls. The layout shows the practical ways people lived and worked in protected family settlements during that era.

The site is open year-round with no admission fee and sits in open countryside a short distance from Cahirciveen town. Walking around it is straightforward since the ground is generally accessible and the fort's circular layout is easy to navigate.

The walls were rebuilt in modern times: on the visible side they stand over four metres high, on the other side about two metres, and the up-to-five-metre-thick masonry is faced smooth outside. Inside, terraces and stairs are cut into the wall, and a roughly one-metre-high circular stone building with a straight passage stands at the centre.