With over 207 train and coach companies in and across 44 countries including Trenitalia and Italo, see where you can go from Nettuno with Trainline today. The grotto gets its name from the Roman god of the sea, Neptune Nettuno is just about 70 km from the capital of Italy and you can easily combine a sun and beach holiday with a city break in Rome, or visit Rome for day trips This lively seaside resort relies largely on summer tourism and offers a host of restaurants, cafes and shops. Neptune's Grotto (Italian: Grotta di Nettuno; Catalan: Cova de Neptú) is a stalactite cave near the town of Alghero on the island of Sardinia, Italy.The cave was discovered by local fishermen in the 18th century and has since developed into a popular tourist attraction. Recommended street view now in Lazio Colosseum - … Sightseeing Lazio: Search on the map Art and Culture (8), Historical Routes (5), Religious Routes (2), Tourist Attractions (5), Tourist places (1). Find station information, search timetables and book tickets to and from Nettuno. Beyond the pool is the immense field of headstones of 7,860 of American military war dead, arranged in gentle arcs on broad green lawns beneath rows of Roman pines. The World War II Sicily-Rome American Cemetery and Memorial site in Italy covers 77 acres, rising in a gentle slope from a broad pool with an island and cenotaph flanked by groups of Italian cypress trees.