The Italian capital of Rome is also often called "the eternal city", as this buzzing metropolis still has many precious treasures from ancient times, which are known around the world. The most impressive sights include the "Thermae of Caracalla", the emperor's forum, the Colosseum, the Piazza Navona, the Fountain of Neptune and of course St. Peter's Basilica, with the dome designed by Michelangelo.