What to do in Rome for 3 days

Rome is the city that punishes the unplanned and rewards the sequenced. It has more unmissable sights per square kilometre than almost anywhere, and the crowds at each of them operate on a clock you can beat if you know it. A three-day plan isn't about seeing everything — that's impossible and the attempt is miserable — it's about ordering the unmissables so you actually enjoy them. Here's a sequence built around the queues rather than against them.

Day 1: ancient Rome, then across the river

Start at the Colosseum at opening time, with a pre-booked timed ticket — this is the one queue in Rome that can eat a whole morning if you don't book. Pair it with the Forum and Palatine, which are on the same ticket and best in the cool of the morning. By early afternoon you'll be hot and footsore; that's the moment to cross the river into Trastevere for a long lunch, then spend the late afternoon wandering its cobbled lanes, which are at their most photogenic as the light drops. End the first evening on the Janiculum hill for the panorama of the city laid out below — it's the view Romans send their friends.

Day 2: the Pantheon, and art you can walk to

Day two is the historic centre, done as a loop. The Pantheon first thing — it's free or cheap, but the queue builds by ten, so go at opening. From there, walk the narrow streets to Piazza Navona, the Trevi Fountain (early morning or after nine in the evening, when the selfie sticks thin out), and the Spanish Steps. If you want one museum, make it the Galleria Borghese — but you must book it, it's timed entry, and it's the most pleasant gallery visit in Rome because the cap on numbers is enforced. End the day in the Jewish Ghetto for dinner, where the food is distinctively Roman and the streets are quieter than the centre.

The Vatican is a half-day minimum and a whole-day temptation, and it's the part of Rome most often done badly. Book the earliest entry available, go straight to the Sistine Chapel via the shortest route the map allows (the museums are vast and it's easy to spend two hours before you get there), and accept that you'll be herded. After St Peter's, recover with lunch across the river, then spend a slow afternoon in the Prati district or the Villa Borghese gardens — green, quiet, and exactly the counterweight the morning needs. Keep the last evening for one small thing after dinner: the Trevi by night, or the Colosseum lit from the street, is the postcard you actually remember.

Rome-specific notes that save time

• Book the Colosseum, the Borghese and the Vatican in advance. These three queues define a Rome trip; none of them forgive a walk-up in high season.
• Drink from the nasoni — the little public water fountains all over the city. The water is cold, free and safe, and it saves a fortune and a queue at cafés.
• Eat where the menu isn't in five languages and there's no one outside beckoning. A trattoria with a handwritten menu and no host outside is almost always the right call.
• Romans eat dinner late. A restaurant serving at 18:00 is serving tourists; one that fills at 21:00 is serving the city.

How many days, and when

Three days covers the Colosseum, the centre, and the Vatican at a pace that doesn't break you. Two days works only if you skip the Vatican interiors. Five lets you add a day trip — Ostia Antica, or Tivoli's gardens — and still breathe. Avoid July and August if you can: the heat is punishing and the queues longest. April, May, September and October are Rome at its most merciful. For an hour-by-hour version with the walking distances and bookings flagged, our itinerary planner does the sequencing for you.