You will admire the exterior of a majestic castle that overlooks the port of Naples on one side and on the other looms over one of the most famous squares in Naples. The construction of its ancient nucleus - today partially re-emerged following restoration and archaeological exploration - is due to the initiative of Charles I of Anjou, who in 1266, defeating the Swabians, ascended the throne of Sicily and established the transfer of the capital from Palermo to the Neapolitan city.

At the end of the walking tour you will begin your tour in the subsoil of Naples, you will discover the secrets that are hidden in the ancient Bourbon Gallery wanted by Ferdinand II of Bourbon in order to create a military path that would allow the troops to reach the Royal Palace in a short time time. The Bourbon Gallery is a long underground tunnel built in the mid-19th century by Ferdinand II of Bourbon and is considered the pride of underground Bourbon civil engineering. Rediscovered in 2005, the gallery offers the public a surprising itinerary in the subsoil and in the history of the Neapolitan city. Through the Standard route it will be possible to appreciate the war refuge, ancient cisterns of the Bolla Aqueduct, fragments of statues, vintage cars and motorcycles found during the safety measures.