Rome is worth visiting. This is not a useful sentence because nobody argues otherwise, but the more relevant question is how to visit it and the answer most people receive is wrong.
Four days in Rome is the right minimum. Three is insufficient, producing the specific frustration of a city glimpsed rather than experienced. The first visit should be understood as an orientation, not a completion. You will leave with a list of things you did not reach. This is correct.
The ancient Rome that most visitors come for is concentrated in the forum and the Palatine. Go to the Palatine Hill rather than just the forum floor: the view from the top, across the Circus Maximus and toward the Aventine, puts the scale of the ancient city into context in a way that the forum itself does not.
The Trevi Fountain at 6 am, before the crowds arrive, is a genuinely different experience from the Trevi Fountain at noon. The same principle applies to Campo de’ Fiori, the Pantheon, and the Borghese Gallery. Timing is the variable that most planning gets wrong.
Castel Gandolfo, 25 kilometers south of the city, is worth a half-day. Papal summer residence, volcanic lake, and a small town that is not organized around tourism. It is the kind of place Rome’s proximity simultaneously enables and obscures.
The historic walking routes are the correct format for the city. Rome is not a museum with an entrance fee; it is a city that happens to contain an extraordinary density of history accessible from the street. Walk. Get lost. That is not a cliché; it is the operational method.