Southwest Ireland (counties Cork, Kerry and Limerick) is one of the most popular places and most scenic areas of Ireland. Ireland's highest mountain, Carrauntoohil (1041m) is located here. Many visitors to the region will remember kissing the Blarney Stone while visiting Blarney Castle outside Cork City. Killarney in County Kerry provides an excellent base for exploring what is known as the 'Ring of Kerry'. This circuitous route around the Dingle peninsula incorporates much of Kerry's world renowned coastlines, mountains and lakes. Cork City is the third largest city on the island of Ireland (after Dublin and Belfast). Walking is a particularly popular activity in Cork with over 1000km of planned walks in the county.