Castel dell'Ovo: (Via Partenope)  M-Sat 9 am - 6:30 pm.  The grey mass of the Castel dell'Ovo or "egg-castle" takes its name from the whimsical legend that it was built over an egg placed here by Virgil in Roman times.  It was believed that if the egg broke, Naples would fall.  It stands on the tufga rock of the ancient island of Megaris, once a fortification of the Greek colony of Parthenope.

  Castel Nuovo:

  Castel Sant'Elmo: (Via Tito Angelini)  Daily 8:30 am - 7:30 pm.  Five minutes' walk from the Morgen funicular station, Castel Sant'Elmo occupies Naples' highest point.  The 14th century structure was once used for incarcerating political prisoners.

  Certosa Di San Martino:  See Wikipedia.  A 14th century monastic complex.

  Cimitero Della Fontanelle:  A cavernous underground cemetery hacked out of Naples's tufa foundations.  M, T & Th-Sun 10 am - 5 pm.  Bus #84 from Via Toledo, opr #178 from the archaeological museum.  May temporarily be closed.  See also Wikipedia.

  Gesu Nuovo:  Plaza del Gesu Nuovo -- 9am - 12:30 pm and 5-7.15 pm.  In 1584, Jesuits took over the palace of the Sanseverino princes.  The architect and Jesuit father Giuseppe Valeriani was given the task of transforming the palace into a church, with a view to establishing the seat of the order in Naples.  The church's vast dimensions reflect the fact that it was designed to house the tombs of the Angevin dynasty.  On August 4, 1943, the church was bombed and devastated by fire.

  Hypogeum Of The Cristillani: (Borgo della Sanita) -- The best preserved of the cemeteries that extended across the hillside to the north of the ancient city.  Its barrel vault, bed-like sarcophagi, and sculpted and painted decorations date from the fourth century BCE.

  MADRE  (Museo d'Art Contemporanea Connaregina): M & W-Sat. 10 am - 7:30 pm; Sun 10 am - 8 pm.  See also Wikipedia.

  Palazzo Doria D'Angri:  The palace at the corner of Via Toledo and the Piazza VII Settembre was built in 1755.  After the conquest of Naples, on September 7, 1860, Giuseppe Garibaldi stood on its balcony to proclaim the unification of the Kingdom of the Two Sicilies with Italy.

  Palazzo Reale:  In 1598, the new king of Spain,m Philip III, made Fernandez Ruiz de Castro viceroy of Naples.  The Grand Staircase leads to second-floor apartments (now a museum), formerly inhabited by Bourbons.

  Pio Monte Della Misericordia:  A still-functioning charity, it's one of the artistic treasure houses of Naples, and most people come to see the charity's chapel.  It is best known for Caravaggio's "Seven Acts Of Mercy."

San Gregorio Armeno (Via San Gregorio Armeno) -- M & W 9 am - Noon; Tues. 9 am - 1 pm.  This is a sumptuous Baroque edifice with frescoes above the entrance by Luca Giordano.  The church has the head of San Gregorio and the arm of Lorenzo.  This is also the home to relics of Santa Patrizia, another Neapolitan saint whose blood -- like that of San Gennaro -- liquefies on her saint's day (August 25), as well as every Tuesday morning.  Santa Patrizia was the daughter of an imperial family from Constantinople who sought refuge in Naples in order to keep her vow of chastity.

  San PIetro A Majella:  This tiny late 13th-century church was dedicated to San Pietro Angeleri, the hermit-monk from the mountains of Maiella (Abruzzes), who renounced the pontificate following his election as Pope Celestine V.

  Santa Caterina A Formiello (Piazza Enrico de Nicola) -- One of the city's most highly decorated Renaissance churches.  Dailyt 9am-Noon & 4-7 pm.

  Santa Maria Egiziaca:  Only a few steps from the Annunziata, this church and the adjoining convent were founded in 1342 by Queen Sancia di Maiorca as a Magdalen hospital.  Santa Maria Egiziaca (the Egyptian) was the former prostitute to whom the church was dedicated.

  Church Of The Santi Apostoli: This church, which was probably founded in the fifth century on the site of a temple to Mercury, is dedicated to the Apostles.

  Santissima Annunziata:  The real interest is next door, in a building that was once an orphanage and is now a hospital.  Through a little portico on the left, you can get a close look at the restored ruota, or wheel, in which unwanted babies were left.  Mon - Sat. 9am - 6 pm.  Free.

  Teatro di San Carlo:  (Via San Carlo)  The largest and oldest opera house in Italy.  Guided tours 10:30 am - 4:30 pm.  Charge.  See also Wikipedia.