Carmarthenshire is a county in the south-west of Wales. A county here is a large area with its own local government, not one single town. The name points to the town of Carmarthen. It is mostly countryside: farms, small towns, and coast, and in many places people still use Welsh in daily life. English speakers outside Wales often know the name only from a map or from the news. The ending -shire is an old English way of saying “the land that belongs with this town.” Though actually, this is Wales, not England; the English ending sat on a Welsh place, which is how a lot of Welsh county names look on an English map.