County Clare contains The Burren, a unique karstregion, which has many rare flowers and fauna. At the western edge of The Burren, facing the Atlantic Ocean, are the Cliffs of Moher. The Slieve Bernaghrange in the east of the county and is the highest point in County Clare at 532 meters.
Bodies of water define the physical boundaries of Clare. To the southeast is the River Shannon, Ireland's longest river, and to the south is the Shannon Estuary. The border to the northeast is defined by Lough Dergwhich is the third largest lake on Ireland. To the west is the Atlantic Ocean, and to the north is Galway Bay.