Porto degli Infreschi, Velia
Concierge.com's insider take:
It's worth stopping off at Velia to catch a boat along the coast to the Grotto degli Infreschi, an idyllic pirates' cove of a beach, with water a shade of blue-green you thought existed only on celluloid. This small natural harbor once sheltered fishermen during thunderstorms. The beach can also be reached on foot, but you'll need to ask a local for directions, as the first part of the journey is unsigned.