Doonagore Castle is a 16th-century round tower house with a small walled enclosure.
It is located in the townland Doonagore, parish of Killilagh, about 1 km from the village of Doolin.
The name may be derived from Dún na Gabhair, meaning "the fort of the rounded hills" or the "fort of the goats".
Doonagore Castle is at present a private holiday home, and not open to the public.
It sits on a hill overlooking Doolin Point and is used as a navigational point by boats approaching Doolin Pier.
A castle was built on (or near) the site of an even earlier ringfort by Tadgh (Teigue) MacTurlough MacCon O'Connor some time during the 14th century.
The current structure likely dates from the mid-16th century.
Unlike most tower houses in the region, this was built not from limestone but from sandstone drawn from the quarry of Trá Leachain (flaggy beach) about 2 km to the southwest.
Reference: Wikipedia