Pembrokeshire Coast National Park - the only British national park focused almost exclusively on the coast lies in the far-flung south-west corner of Wales. The impressive cliffs alternate with secluded coves and big sandy beaches, good for swimming, though the waters are chilly. The park has a smattering of historic sites, including the impossibly picturesque St David’s Cathedral, built in a Viking-proof nook by the Irish Sea.
Tenby, with four sandy beaches, is the the most popular resort in the region, a combination of narrow, cobbled streets within the walls of its old town and of pastel-shaded Regency and Georgian houses overlooking the harbor. Medieval Tenby’s ancient town walls still stand, enclosing streets and passageways full of shops, inns, and places to eat. A Tudor scientist named Robert Recorde, who invented the "equals" (=) sign, was born here.