Underground Rome

Yes, and not because of the queue — entry works by timed slot and the slots for a given morning are gone days ahead in spring and autumn. There is no ticket office you can rely on turning up at. Booking the evening before occasionally works in November and January; in May it does not.

On this page, yes — even the €18 offer covers all three, because that is how the state ticket is sold. What is not included is the arena floor and the underground level. Those are separate tiers, and a listing that says "optional arena" means you have not bought it.

Walking in costs nothing. What the €5.60 to €10 listings sell is a reserved entry slot and an audio guide, which saves you the security queue on the square rather than an admission fee. The dome climb and the excavations below are genuinely paid extras.

No. It sits at the end of the Vatican Museums route, so any ticket to it is a Museums ticket, from €29.20. Anyone selling you a cheaper "Sistine Chapel only" entry is selling you something else — usually a guided walk that ends outside.

It moves you past the ticket-buying line, and that is all it can do. Security screening at the Colosseum, the Vatican Museums and St Peter's applies to everyone, and at St Peter's that is the queue people are actually standing in. Operators who promise no waiting at all are promising something they do not control.

Roughly half. Those days run eleven to twelve hours door to door and the sites are in Campania, not Lazio. If a full day on the road does not appeal, Tivoli is the short alternative: two villas, and close enough to be back for dinner.

Not for the city, and it can cost you money. The historic centre is a ZTL, a restricted traffic zone, and driving in without a permit triggers an automatic fine that reaches you months later. A car makes sense for the Castelli Romani hills, Tivoli or the coast, picked up on the day you leave the city.

The Vatican Museums close on Sundays, except the last Sunday of the month when entry is free and the queue is accordingly long. Each catacomb complex on the Via Appia has its own closing day, and they do not share one. Check the day before you book, not the day you go.