Dun Aengus is a prehistoric cliff fort defended on the landward side by three semicircle rings of massive dry-stone battlements, and a broad band of vicious looking sharp upended rocks placed in such a way that they would impede any enemy. There are three other such strongholds on the island, each an impressive in its own way. Inishmaan , the middle island, is the least served by ferry service. It remains the most unspoiled island in the group and the most traditional. Some of the older women wear the old style of calf-length woolen skirts, with a colorful shawl and headscarf.
Automobiles are few and far between.
Walking paths and rocky hillsides beckon to the agile visitor. Inisheer , the smallest of the three islands, is sectioned off by countless stonewalls. The main villages are in the northern section of the island, which are enhanced by two beautiful sandy beaches. The ruins of a 15th century tower house known as O Brien s Castle also dominates the north shore. . Teampall Chaomhain, called the Church of Kevin, had to be excavated from an extremely large sand dune strewn with seashells.