Gaiola Bridge, Naples, Italy

Gaiola Island is one of the minor islands of Naples, Italy; it is offshore of Posillipo and gives its name to the Underwater Park of Gaiola (Parco Sommerso di Gaiola), a protected marine area. The island takes its name from the cavities that dot the coast of Posillipo (from the Latin cavea, "little cave", and then through the dialect "Caviola"). Originally, the small island was known as Euplea, protector of safe navigation, and was the site of a small temple. The island is very close to the coast, reachable with a few strokes of swimming. It is assumed that originally it was nothing more than an extension of the promontory opposite and was artificially separated only at a later time at the behest of Lucullus. In the 17th century the island was virtually littered with Roman factories, while, two centuries later, the island served as a battery in defense of the Gulf of Naples.  Source