The main area for exploring the ruins of ancient Rome is in Rome/Colosseo either side of Via dei Fori Imperiali, which connects the Colosseum and Piazza Venezia. Constructed between 1931 and 1933, at the time of Mussolini, this road destroyed a large area of Renaissance and medieval buildings constructed on top of ruins of the ancient forums and ended forever plans for an archeological park stretching all the way to the Appian Way. Heading towards the Colosseum from Piazza Venezia, you see the Roman Forum on your right and Trajan's Forum and Market on the left. To the right of the Colosseum is the Arch of Constantine and the beginning of the Palatine Hill, which will eventually lead you to ruins of the Flavian Palace and a view of the Circus Maximus (see Rome/Aventino-Testaccio). To the left, after the Colosseum is a wide, tree-lined path that climbs through the Colle Oppio park. Underneath this park is the Golden House of Nero (Domus Aurea), an enormous and spectacular underground complex restored and then closed again due to damage caused by heavy rain. Further to the left on the Esquiline Hill are ruins of Trajan's baths.

In Old Rome you must see the Pantheon, which is amazingly well preserved considering it dates back to 125 AD. There is a hole constructed in the ceiling so it is an interesting experience to be there when it is raining. If you are heading to the Pantheon from Piazza Venezia you first reach Largo di Torre Argentina on your left. Until 1926 this was covered in narrow streets and small houses, which were razed to the ground when ruins of Roman temples were discovered. Moving along Corso Vittorio Emmanuelle and crossing the Tiber river into the Vatican area you see the imposing Castel Sant' Angelo, built as a Mausoleum for the Emperor Hadrian. This is connected by a covered fortified corridor to the Vatican and served as a refuge for Popes in times of trouble.

South of the Colosseum are the Baths of Caracalla (Aventino-Testaccio). You can then head South-East on the old Appian Way, passing through a stretch of very well-preserved city wall. For the adventurous, continuing along the Appian Way (Rome/South) will bring you to a whole host of Roman ruins, including the Circus of Maxentius, the tomb of Cecilia Metella, the Villa dei Quintili and, nearby, several long stretches of Roman aqueduct.

Returning to the Modern Center, the Baths of Diocletian are opposite the entrance to the main railway station, Termini. The National Museum of Rome stands in the South-West corner of the Baths complex and has an enormous collection of Roman scultures and other artifacts. But this is just one of numerous museums devoted to ancient Rome, including those of the Capitoline Hill. It is really amazing how much there is.