Cliffs of Moher

The Cliffs of Moher (; Irish: Aillte an Mhothair) are sea cliffs located at the southwestern edge of the Burren region in County Clare, Ireland. They run for about 14 kilometres (9 miles). At their southern end, they rise 120 metres (390 ft) above the Atlantic Ocean at Hag's Head, and, 8 kilometres (5 miles) to the north, they 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.

O'Brien's Tower marks the highest point of the Cliffs of Moher, a very popular tourist destination in County Clare, Ireland. It is located a short distance from the villages Doolin and Liscannor.

The Burren and Cliffs of Moher Geopark (formally The Burren and Cliffs of Moher UNESCO Global Geopark) is an internationally designated area of geological interest in The Burren region of County Clare, Ireland. It is the third Geopark to be designated in Ireland, and is recognised at both European and global levels.