Centrale Montemartini

The Piazza di Spagna (Spanish Square) is the most famous square in Rome. For a very long time it was the meeting point of all foreigners coming to Rome. In the 17th century it was the residence of the Spanish Ambassador to the Holy See. The area around the residence was Spanish territory and foreigners who stayed here without permission were forced to serve in the Spanish army. The Fontana della Barcaccia (Old Boat Fountain) on Piazza di Spagna was designed and built in 1627-29 by Pietro Bernini, father of the more famous Gian Lorenzo Bernini. The fountain celebrates the fact that before high walls were built along the banks of the Tiber Rome often used to flood. Once the waters were so high that a boat ended up in the square. The decorations on the fountain imitate the coat of arms of Pope Urban VII, Barberini'p, who ordered the fountain to be built. A less aesthetic occupant of the square is Italy's first McDonalds, dating back to 1986. Also in the piazza is a column erected in 1856 to commemorate the Immaculate Conception. The column is topped by a statue of the Virgin Mary, and rests on a base with statues of Moses, David, Isaiah and Ezekiel. The Pope visits the Piazza every year on December 8th to celebrate Immaculate Conception.

If it is sunny, you'll catch a few young people and older gentlemen sitting at the base of a statue in the middle of the open space. The statue is a brooding, hooded Giordano Bruno—an excommunicated Dominican monk and one of the earliest cosmologists who held the idea of an infinite universe. He was burnt at the stake for heresy on this spot on 17 February 1600. The piazza is used as a marketplace during the day, and party central for college students and tourists at night. When the sky gets dark and the street lamps go on, the Campo de' Fiori fills with people and lovers wander arm in arm in the crowd. Over the buzzing of conversation and the occasional burst of laughter you may hear a young vocalist belt out O Sole Mio at the top of his lungs as change plunks into his accordion case.

A strange building, constructed by Reginald Pole, an English cardinal and later Archbishop of Canterbury, allegedly on the spot where he was able to escape from assassins sent by the English King Henry VIII.

The temple of the Emperor Hadrian was consecrated in 145 AD by Emperor Antoninus Pius. The remains of the antique temple were incorporated into a new building that served as the Papal Customs House. It was finished around 1690 and today accommodates the Stock Exchange (Borsa).

A lovely, if somewhat run-down park (parts of it are blocked due to the poor state of the roads) with statues and a great view on the city.

Perhaps the most fascinating building in Rome. The core of the structure began life as the mausoleum of Emperor Hadrian, built between 135 and 139 AD. Subsequent strongholds built on top of the mausoleum were in turn incorporated into a residence and castle by medieval Popes. The building was used as a prison until 1870 but now houses a museum. Opera buffs will be exhilarated to visit the balcony from which Tosca leaps to her death. Film buffs will recognise it as a setting from Angels and Demons.

Unusual ancient Roman theatre with apartments built on top.

A medieval church dating from the 6th century and home to the Bocca della Verità (Mouth of Truth). The Bocca della Verità at the entrance to the church is thought to be a 1st-century manhole cover. It is believed that if you put your hand in the mouth and tell a lie, the hand will be bitten off. Queues for the privilege of risking this can get rather long. Don't ignore the church, which is a gem, and has a separate entrance. Its mosaic floor in the Cosmatesque style is more rustic and less intricate than some others (Santa Maria in Trastevere, for example), but its simplicity gives it a solidity not found in the more ornate styles. S.M. in Cosmedin has a fine medieval choir enclosure and the tallest medieval belfry in Rome.

The chains that allegedly held St. Peter are displayed in a case before the altar. More importantly, contains the impressive statue of Moses by Michelangelo. It's close to the Colosseum, but a little hard to find. Take the steps opposite the Colosseum on Via dei Fori Imperiali, cross the road at the top and seek directions. Also reachable through steps to the right leading off Via Cavour.

An ethnographic collection of around 60,000 pieces from European indigenous cultures. Documents evolution from the Palaeolithic age to the Iron Age.

The Servian Wall was the first wall around Rome, built around the 3rd century BC. This well-preserved section provides a good opportunity to observe the construction methods of that time, particularly the use of tufa rock blocks

They are posted at entrances to the Vatican City to provide security and protect the Pope. They wear very colourful clothing, similar to the uniforms worn by Renaissance-era soldiers. The Pontifical Swiss Guards is also the smallest and oldest standing army in the world, founded in 1506 by Pope Julius II. The origins of the Swiss guards, however, go back much further as the popes had regularly imported Swiss mercenaries during the 1400s.

This is the attractive park on the hillside directly west of the Colosseum. Visible ruins in the area come from the Baths of Trajan. These baths were built on the top of the ruins of Domus Aurea - the Golden House of Nero (the Colosseum was built on the drained site of Nero's lake). The area underneath the park contains an enormous area from Nero's villa. It was restored at great expense in the 1980s and 1990s, opened to the public, and then closed again after a few years when it began to leak!

The western end of the ancient Via Appia road connecting Rome to Brindisi in the heel of Italy, and as such the third world heritage site in Rome together with the Old Center and the Vatican. As such it's an important historical location, even if the remains of the gate aren't as impressive as the city's major sites. As Via Appia heads southeast out of Rome, and after a few kilometers the route is officially named Via Appia Antica and starts looking more historical: it gets narrow as a city street, the asphalt is replaced by a rock surface and the road is lined with parks and park-like areas and walled old buildings. This section has been described as the world's longest museum.