Towns in MayoTowns in MayoCastlebarCastlebar, County Mayo is a town in Ireland with an interesting history and geography. It was originally called “Caiseal Barr” which means "stone castle" and it has been inhabited for centuries by the Gaelic Irish. WestportWestport, County Mayo is a beautiful place to visit. It's a small town in the west of Ireland which has much to offer visitors with its fascinating history and wildlife.