


The closest settlements are Liscannor (6 km south) and Doolin (7 km north). It was demolished in 1808 to provide material for a lookout/telegraph tower that was intended to provide warning in case of a French invasion during the Napoleonic wars. The writer Thomas Johnson Westropp referred to it in 1905 as Moher Uí Ruis or Moher Uí Ruidhin. The fort still stood in 1780 and is mentioned in an account from John Lloyd's A Short Tour Of Clare (1780).

At their southern end, they rise 120 metres (390 ft) above the Atlantic Ocean at Hag's Head, and, eight kilometres to the north, reach their maximum height of 214 metres (702 ft) just north of O'Brien's Tower , a round stone tower near the midpoint of the cliffs, built in 1835 by Sir Cornelius O'Brien , then continue at lower heights. The cliffs take their name from an old promontory fort called Mothar or Moher, which once stood on Hag's Head, the southernmost point of the cliffed coast, now the site of Moher Tower. The Cliffs of Moher ( /ˈmoʊ(h)ər/ Irish : Aillte an Mhothair) are sea cliffs located at the southwestern edge of the Burren region in County Clare, Ireland.
