Dun Aengus (Dún Aonghasa, Aran Islands Dialect: dūn aŋgəs) is a Bronze Age and Iron Age fort on the edge of a cliff overlooking the Atlantic Ocean on Inishmore. It consists of a series of concentric circular walls. The innermost—the citadel—encloses an area approximately in diameter with thick walls of stone. Black Fort (Dún Dúchathair) O'Brien's Castle on Inisheer was built in the 14th century. The castle was taken from the O'Briens by the O'Flaherty clan of Connemara in 1582. Teampull Bheanáin is considered the smallest church in the world, and is notable for its orientation: north–south instead of east–west. Teampall an Cheathrair Álainn has a holy well, which inspired J. M. Synge's play The Well of the Saints.
Dun Aengus (Dún Aonghasa, Aran Islands Dialect: dūn aŋgəs) is a Bronze Age and Iron Age fort on the edge of a cliff overlooking the Atlantic Ocean on Inishmore. It consists of a series of concentric circular walls. The innermost—the citadel—encloses an area approximately in diameter with thick walls of stone. Black Fort (Dún Dúchathair) O'Brien's Cas.tl.e on Inisheer was built in the 14th century. The castle was taken from the O'Briens by the O'Flaherty clan of Connemara in 1582. Teampull Bheanáin is considered the smallest church in the world, and is notable for its orientation: north–south instead of east–west. Teampall an Cheathrair Álainn has a holy well, which inspired J M Synge's play The Well of the Saints.