Learn the ticket system, not the map
The map is intuitive. The ticketing is not. Find out whether it is zone based, distance based or flat rate, whether you need to validate a paper ticket, and whether contactless bank cards work directly, which they now do in a growing number of cities.
Day passes and tourist cards
A day pass pays for itself around the third journey. City tourist cards bundle transport with museum entry and are worth it only if you were going to visit the included sites anyway. Do the arithmetic rather than assuming.

Fines are real
Unvalidated tickets carry on the spot fines in most European cities, and inspectors are unimpressed by tourists. Validate every time, keep the ticket until you exit, and photograph it if it is a paper one that might disintegrate.
When to walk instead
In compact historic centres, walking is usually faster than any two stop metro journey once you count the stairs and the wait. Use transport for the long axis of the day and walk everything else.
Voyager Systems publishes travel information only. We do not sell flights, accommodation or tours, and nothing on this page is a booking. Always confirm schedules, prices and entry requirements with the official provider before you travel.