Castel dell'Ovo (Egg Castle) is a seaside castle in Naples, located on the former island of Megaride, now a peninsula, on the Gulf of Naples in Italy.

The castle's name comes from a legend about the Roman poet Virgil, who had a reputation in the Middle Ages as a great sorcerer and predictor of the future. In the legend, Virgil put a magical egg into the foundations to support the fortifications. Had this egg been broken, the castle would have been destroyed and a series of disastrous events for Naples would have followed. The castle is located between the districts of San Ferdinando and Chiaia, facing Mergellina across the sea. Thankfully, the castles are still standing, and walking up to the castle's ramparts will reward you with a breathtaking panorama.

As the oldest standing fortification in Naples, the Castel dell'Ovo has never been compromised. Besides, it was a prison that once imprisoned several kings, queens and queen. Castel dell'Ovo is more sea than Castel Nuovo. When the weather is good, the Capri Island and Mount Vesuviuscan be seen. Castel dell'Ovo is a museum inside, and the exhibits are mainly paintings. You can see a lot of works by local Neapolitan artists. The Castel dell'Ovo building itself is also worth seeing.