Elegant Beaumaris is on the Isle of Anglesey, the largest island directly off the shore of Wales. It's linked to the mainland by the Britannia road and rail bridge and by Thomas Telford's remarkable chain suspension bridge, built in 1826 over the Menai Strait. Though its name means "beautiful marsh," Beaumaris has become a town of pretty cottages, Georgian houses, and bright shops; it also has Plas Newydd, one of the grandest stately homes in Wales.
Around 70% of Anglesey's 60,000 or so inhabitants speak Welsh, so you'll probably hear it more than English.