Llansteffan and Llanybri are neighbouring idyllic coastal villages in Carmarthenshire. Understand Get in On the B4312 8 miles south of Carmarthen. Bus 227 from Carmarthen. Get around See Llansteffan Castle, 51.765636°, -4.390567°. A Norman castle built in 1100 as part of the Norman invasion of Wales. Do Wales Coast Path. Buy Eat The Castle Inn, The Square, 51.771343°, -4.392235°, +44 1267 241225. 2016-11-18 Drink Sleep Mansion House, Llangain, 51.795481°, -4.367164°, +44 1267 241515. Connect Go next Carmarthen Laugharne Ferryside