Parco degli Acquedotti

This church, which was commissioned by Ferdinand and Isabella of Spain, marks the point where, according to tradition, St. Peter was crucified. Particularly interesting for Irish visitors as it contains the graves of three Gaelic Chiefs who fled Ireland in 1607.

Beautiful park, the 2nd largest in Rome (after Villa Doria Pamphili) at 450 acres/182 hectares. Hosts concerts on summer evenings. former summer residence of Italian monarchs. Also known for it's bunker.

A 1st-century tomb surrounded by two farmhouses from the Middle Ages, one of which used to be a cheese store. Rather hidden behind a high wall, the tomb is rarely open to the public. You might be lucky on a Sunday: on the third Sunday of every month there is a guided tour at 11:00.

The Scala Sancta (Holy Stairs) is, according to Roman Catholic tradition, the staircase used by Jesus Christ to approach Pontius Pilate to be sentenced to death. Attracts numerous pilgrims who climb the stairs on their knees.

It was constructed to hold relics of the Passion of Jesus. They include two thorns of his crown, part of a nail and three small wooden pieces of the Cross. The authenticity of these relics is much disputed, however.

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.

Completed in 1762 to a design by Nicola Salvi, this spectacular Baroque fountain features a mythological sculptural composition of Neptune, god of the sea, flanked by two Tritons: one Triton labours to control a violent sea-horse, the other controls a pacified creature, both symbolising the dual nature of the world's oceans. The location of the Trevi fountain marks the terminus of the ancient Aqua Virgo aqueduct, completed in 19 BCE in order to supply the Baths of Agrippa, and is so named on account of its position at the junction of three roads (tre vie). The legend says that one who throws a coin in the fountain shall one day return to Rome. The coins in the fountain are regularly collected to finance charities. The fountain has been made even more famous by the 1954 film, Three Coins in the Fountain, and by a famous scene in Federico Fellini's film La Dolce Vita. According to popular superstition and custom, throwing coins with one's right hand over one's left shoulder into the Trevi Fountain is a practice endowed with good luck. Throwing one coin ensures that the thrower will return to Rome; throwing two coins will ensure that the thrower will fall in love with a beautiful Roman girl (or handsome boy); throwing three coins, finally, ensures that the thrower will marry that girl or boy in Rome itself. The fountain is one of Rome's most famous attractions, but the square isn't exactly as large as St. Peter's, therefore it might be packed with crowds almost like at a rock festival. For this reason it's reportedly also a pickpocket hotspot, so do watch your pockets and bags here!

Home of the President of the Italian Republic, and the Quirinal Gardens. Built in 1573 as a papal summer residence, and has since also served as the residence for the pope and later for the king of Italy.

Built in honour of Victor Emmanuel, the first king of a unified Italy, this vast structure may appear to be solid white marble but actually contains many rooms inside. There are two permanent museums, one on Italian Reunification and one on emigration from Italy, as well as other spaces that host rotating exhibitions. A walk through the Flag Room leads to the tomb of the unknown soldier. Good views from half-way up but you can also pay €10 (€2 concessions) and take a lift all the way to the top.

The Collegio Romano was a college of the Jesuit order. Many popes, cardinals and bishops were educated here. Since 1870 it has been a secular (non-monastic) school. The coat of arms on the doorway is that of Pope Gregory XIII (1572–1585). The tower was erected in 1787 and served as an observatory. Until 1925 all clocks in Rome were set after that of the Collegio Romano.

On the other side of the Via dei Fori Imperiali to the Roman Forum. Well-preserved market area that doubled as a way of stopping the Quirinal Hill from collapsing. Below in the Forum is Trajan's Column, built in 113 with reliefs depicting the Emperor Trajan's vistories in battle.

The contours of the ancient stadium, built in the 6th Century B.C., are still visible in what is now a park in the shadow of the Palatine. Circus Maximus was primarily devoted to chariot races and was used for this purpose until around 550 AD. The stadium could seat up to 150,000 people. Originally built of wood, it burnt down twice, on the second occasion starting the great fire when the Emperor Nero was said to fiddle while Rome burned. It was in one of the tunnels here that Caligula met his end. Excavations began in 2009 at the east end of the circus and are likely to go on for some years.

This massive early 17th-century Baroque fountain was built to celebrate the re-opening of an old Roman aqueduct. Water played an important role in this area in Roman times as the grain was milled here using water mills.

This was the site of the slaughter in 1944 of 335 Italians, including many Jews from the Ghetto, in retaliation for a Partisan attack on German troops in Rome. The caves where the massacre took place are now a National Monument and Memorial Cemetery and can be visited daily.

The pride of Baroque Rome, was established towards the end of the 15th century, and preserves the shape of the ancient Stadium of Domitian. The buildings surrounding the square stand where the spectators once sat, watching the spectacle of the naumachiae (battles among ships). The square remains completely unspoilt by traffic and modern buildings. Today, the square is an immensely popular place to sip a cappuccino, shop, and watch street performers. Behind the piazza at the northern end, you can still see remains of the Roman athletic stadium well below the current ground level. Amongst the various monuments of the square, look especially for the two Baroque masterpieces by Bernini and Borromini.

Built in 81 AD by the emperor Domitianus in dedication to his brother Titus, who died earlier that year and reigned as emperor from 79-81, overseeing the opening of the Colosseum in 80 and the eruption of Mt Vesuvius the previous year.

This church was built next to the mausoleum of Santa Costanza in the 7th Century and is on top of catacombs. It is very unusual in that the floor level is at the level of the catacomb floor, and the street entrance is at the level of the second floor gallery. The body of St. Agnes lies in a silver sarcophagus. There are several stories about her death at the age of 13 in 304 AD. One is that the prefect Sempronius wanted her to marry his son, and condemned her to death when she refused. Roman law did not permit the execution of virgins, so he ordered her to be raped but her virginity was miraculously preserved. She was then condemned to be burnt at the stake but the wood would not burn. Another is that she was stripped naked by the Emperor Diocletian because of her refusal to marry but that her hair then grew rapidly to preserve her modesty.

Next door to Santa Croce. A collection of around 3000 pieces, although only a third of these are displayed.

The church was built by order of Pope Sixtus VI (della Rovere). The campanile was erected in 1504 by Bramante and the church has frescoes of the four sibyls by Raphael in its interior.