Based upon an architectural sketch by Michelangelo, this 17th-century museum showcases a prominent collection of artifacts, art and archaeological finds. Items range from the first century BC to the 17th century AD, including the famous fragments of a massive sculpture of Constantine. The overflow of the Capitoline museums collection is housed at the Centrale Montemartini (Via Ostiense 106, Tue-Sun 9.30am-7pm, Metro: Garbatella), a former electrical power plant. Over 400 pieces from the Capitoline collection of ancient sculpture are displayed against the surreal backdrop of the station's gleaming machinery, steam turbines, diesel engines and a colossal cast-iron boiler. BUS: 44, 64, 70, 75, 170, 492 or 628.

A statue of the Archangel Michael stands atop the Castel Sant'Angelo and is the source of the castle's name. It was originally built in the second century as Emperor Hadrian's mausoleum. Visitors, especially kids, will be charmed by the draw bridges, trap doors, ditches, canons, dungeons, weapons and papal apartments here. The terrace of the castle offers a splendid view of the city in all directions. There is also a charming café. BUS: 80, 87, 280, 492. METRO: Lepanto

A statue of the Archangel Michael stands atop the Castel Sant'Angelo, and the castle is named for this saint. This towering fortress overlooks the Tiber River and was originally built as a mausoleum by the Emperor Hadrian and has since been annexed to the Vatican. BUS: 23, 34, 87, 98, 280, and others, METRO: Lepanto

Founded in 1839, this remarkable museum contains ancient Egyptian artifacts such as mummies, vases, hieroglyphics, jewelry, and sarcophagi. There's also a remnant of a statue of Ramses II, the pharaoh who enslaved the Hebrews during the time of the Exodus.

The apartment where influential English poet John Keats spent the last few months of his life is now a museum dedicated to the history of romanticism. Memorabilia, manuscripts, paintings, and books dedicated to the life and work of Keats, Shelly, Byron and Hunt. Guided tours by appointment.