Can't remember ever having visited Doolin before. Certainly I don't recall this beautiful fairytale castle sitting high on the hill overlooking the town. The original castle was built in the 14th Century, though the tower dates from the 16th Century. In 1588, a ship of the Spanish Armada was wrecked nearby and 178 survivors were hanged at the castle on the orders of the High Sheriff of Clare. It is now a private holiday home.
There is no evidence that it was ever a lighthouse but it is included here because a) it looks great and b) some sites refer to it as being used as a navigational marker for boats coming into Doolin pier. In the picture above, the small island lying just off shore is Crab Island which protects the pier from the buffeting of the waves which can be quite fierce south of the island. Seen from out to sea, there is a constant haze in the air, marking where the Atlantic smashes into Crab Island. Personally I'd have thought that any boats would be better off making for the haze than the castle but if the internet says its a navigational daymark, I need no further excuse to include it here!