Ancient Rome's other big former imperial bathing site, Terme di Diocleziano is today the Baths of Diocletian National Museum. Besides a museum, the site is expansive enough to hold two churches and large parts of a Carthusian monastery.
Greek and Roman sculpture, pre-Christian and later sarcophagi, and some truly remarkable and well-preserved mosaics and frescoes greet visitors to the museum.
If you're up for a bit of retail therapy, head over to Via Condotti, set off Piazza di Spagna in the city's centro storico ("historic quarter"). The fashionable street is home to some of the world's most famous designer boutiques including Gucci, Dior, Valentino, Hermès, and Armani.
Also located on Via Condotti is Antico Caffè Greco, founded in 1760 and the oldest café-bar in Rome and second oldest in Italy, after Caffè Florian in Venice.
Known as Mercatus Traiani, this ancient market place is often referred to as the oldest shopping mall in the world. Completed in 110 CE and named for Trajan, one of the greatest of Roman emperors, it would have sold a variety of everyday wares including fruits, vegetables, fish, wine, oil, and spices.
Rome is perhaps the last place you'd expect to stumble across an Egyptian pyramid, but then again the city is full of surprises. The Pyramid of Cestius was most likely built between 18 and 12 BCE as a tomb for a wealthy Roman resident in the wake of the Roman conquest of Egypt in 30 BCE. It's the only 'Egyptian' pyramid found in Europe.
Piazza Venezia is a famous square in Rome. But it's also notorious for being the location of "Mussolini's Balcony." It's from here (marked by the flags in the photograph) that Italy's fascist dictator, Benito Mussolini, made some of his most memorable speeches to the crowds below. On one occasion, Il Duce was joined on the balcony by Adolf Hitler. The ornate palace, Palazzo Venezia, that dominates one side of the square, served as Mussolini's headquarters throughout the 1930s.
Built in honor of Roman emperor Marcus Aurelius and completed in 193 CE, Marcus Aurelius Column in front of Palazzo Chigi is remarkable for its spiral relief, which tells the story of Marcus Aurelius' wartime exploits, including the conflict in Germania, part of the Marcomannic Wars.
A good excuse to leave the hustle and bustle of the city center and head into the Roman countryside is to admire the ruins of two colossal ancient aqueducts, Aqua Claudia and Aqua Marcia. Both are found in the Parco degli Acquedotti, or Aqueduct Park.