Castel sant'Elmo is a medieval castle, used as a museum, located on the Vomero hill near San Martino in Naples. It was once called Paturcium and stands in the place where, from the 10th century, there was a church dedicated to Sant'Erasmo (from which Eramo, Ermo and then Elmo). This mighty building (the first castle by extension of the city), partly derived from living rock (Neapolitan yellow tuff), originates from a Norman observation tower called Belforte. Due to its strategic importance, the castle has always been a coveted possession: from its position (250 m s.l.m.) one can observe the whole city, the gulf, and the roads that from the surrounding hills lead to the city. The castle, as well as a permanent museum, the "Naples Novecento", is also home to various temporary exhibitions, fairs and events: from 1998 until 2011 during the spring it was the headquarters of the Napoli Comicon (from 2012 moved to the Mostra d'Oltremare ). The castle, owned by the Italian State, since December 2014 is part of the assets managed by the museum complex of Campania. In 2016 he registered 199 233 visitors [2].

Posillipo already appears in the sources of the ancient Greeks, the first to inhabit the promontory then entirely covered by rocks and trees. There are Roman ruins near the banks as well as near the highest point of the hill; it is possible to see the remains of the openings that ventilated the tunnel that led to the residence of Publius Vedio Pollione. The remains of an amphitheater are also present. With the end of the ancient age the population of Naples closed in the fortified walls and the whole area fell into decline, completely prey to the barbarian invasions and neglect. In modern times, the area remained substantially underdeveloped until the construction of the Via Posillipo between 1812 and 1824. The road begins at the port of Mergellina and extends along the coast, almost parallel to the shore. Much of the area has been heavily rebuilt following the Second World War, but has preserved several historic buildings, including Villa Rosebery, residence of the President of the Republic [3].

You can admire the magnificent sea view and breathe the sea air.