Doonagore Castle is a well-preserved tower house located near Doolin in County Clare, Ireland. The castle dates back to the 16th century, and it was built by the O'Brien clan, who were powerful rulers in the area. It is believed that the castle was built on the site of an earlier fortification that was destroyed during the Norman invasion of Ireland.

Doonagore Castle is a typical example of an Irish tower house, which were built in the late medieval period for defensive purposes. The tower house consists of a tall, rectangular tower with a crenellated parapet at the top. The tower is four stories high, with each level accessed by a spiral staircase.

Doonagore Castle was abandoned in the 19th century and fell into disrepair. It was purchased by an American architect named James Fleming in the 1970s, who restored the castle to its former glory. Today, the castle is open to the public, and visitors can climb to the top of the tower to enjoy stunning views of the surrounding countryside and the Atlantic Ocean. The castle is also a popular spot for photographers and has been featured in several films and television shows.