Llansteffan sits on the mouth of the River Tywi. My top tip is the walk to the castle. You can see the old stone walls on the hill for free. It is a prime choice for a low cost day out with views of the sea. The village has a long beach with fine sand. You can walk the paths to see the cockle boats in the bay. This spot has deep roots in the life of the coast. Visit the holy well of St Anthony for a quiet time in the trees. The air is fresh and the paths are easy to walk. It is a smart spot for a trip. Life here is tied to the tides.