Naples is a beautiful city with so much to see and do. Here's an ideal itinerary for 3 days in Napoli:

Day 1:

Start your day by visiting the historic center of Naples, which is a UNESCO World Heritage Site. You can explore the narrow streets, colorful buildings, and stunning architecture. Visit the Piazza del Plebiscito, one of the largest squares in Italy, and admire the Royal Palace of Naples and the San Carlo Theatre. After that, head to the Castel dell'Ovo, a medieval castle located on a small island in the Gulf of Naples. Enjoy the breathtaking views of the sea and the city from the castle.

In the afternoon, visit the National Archaeological Museum of Naples, which houses an impressive collection of ancient Roman artifacts, including mosaics, sculptures, and frescoes. End your day by enjoying some authentic Neapolitan pizza at one of the many pizzerias in the city.

Day 2:

Start your day by visiting the Catacombs of San Gennaro, an underground cemetery that dates back to the early Christian era. The catacombs are home to thousands of tombs and frescoes, and they offer a fascinating glimpse into the history of Naples.

After that, head to the hilltop district of Vomero, where you can visit the Castel Sant'Elmo, a medieval fortress that offers panoramic views of the city. From there, take the funicular down to the Chiaia district, where you can stroll along the waterfront promenade and enjoy the sea breeze.

In the evening, head to the Quartieri Spagnoli, a vibrant neighborhood known for its narrow streets, colorful buildings, and lively atmosphere. Enjoy some local street food and drinks at one of the many bars and restaurants in the area.

Day 3:

Start your day by visiting the Pompeii Archaeological Site, which is located about 30 minutes from Naples by train. Pompeii was destroyed by the eruption of Mount Vesuvius in 79 AD, and the site offers a fascinating glimpse into life in ancient Rome. You can explore the ruins of houses, temples, and public buildings, and see the preserved remains of the city's inhabitants.

In the afternoon, head to the nearby town of Sorrento, which is known for its stunning views of the Bay of Naples and its lemon groves. Take a stroll along the narrow streets of the historic center, visit the Cathedral of Sorrento, and enjoy some limoncello, a local liqueur made from lemons.

In the evening, head back to Naples and enjoy some more delicious Neapolitan cuisine at one of the many restaurants in the city.