Charming Tenby is the epicentre of Pembrokeshire coast holiday culture. The image of its sheltered harbour and lifeboat slipway, overlooked by pastel Georgian townhouses, is a Pembrokeshire badge. Tenby's top trip is the 20-minute boat ride to Caldey Island, the home of a community of Cistercian monks, as well as grey seals and Wales' largest cormorant colony. Located on a rocky promontory surrounded at low tide by golden sands, Tenby's old town features attractive architecture, steep streets and curious nooks, plus a 500m section of town wall. The place is popular with well-heeled weekend tourists and sore-heeled coast path walkers. The castle on the promontory above the beaches was built by the Normans, and the town was fortified in the 13th century after unsuccessful attempts at recapture by the Welsh. On Caldey Island, there are twice-daily guided tours of the monastery and lovely walks around the island, with good views from the south-side lighthouse. Boats depart from the quay at high tide and Castle Sands at low tide and run every 20 minutes. Also worth a visit is the handsomely restored 15th-century Tudor Merchant's House, furnished according to the time. The remains of early frescoes are visible on interior walls. Other Tenby sights include the castle ruins and, within them, Tenby Museum & Art Gallery, which tells Tenby's story and displays paintings of surrounding landscapes, and portraits by Augustus and Gwen John. Guided walks of Tenby's historical sites are run by Town Trails, with themes such as ghosts, poets and painters.