Three Cliffs Bay, otherwise Three Cliff Bay, is a bay on the south coast of the Gower Peninsula in Swansea, Wales. The bay takes its name from the three sea cliffs that jut out into the bay. Pennard Pill, a large stream, flows into the sea in the middle of the bay. The stunning views from the valley leading down to the sea complete with castle, salt marshes, sand dunes and the three cliffs are simply breathtaking!