Ireland - Forts of Aran

"Western Stone Forts represent the penultimate use of a distinctive settlement form i.e. the drystone, generally circular, enclosure, a class of monument that was widely used by the maritime communities of the north Atlantic seaboard of Western Europe, throughout much of later prehistory. Western Stone Forts represent the apogee of the ringfort class of monument (an enclosed farmstead occupied by an extended kin group).The distribution, character, and hierarchy of forms of ringforts provides a mirror of the organisation, economy and polity of Irish society at a particular period (AD 700-1000). Dun Aonghusa, Aran; Cahercommaun; Caherconree; Benagh; Staigue." Source: UNESCO World Heritage Tentative List

Forts of Aran - Dun Eochla, Black Fort, Eoghanachta, Dun Aonghasa. Thanks to Dee of Ireland.