Intercity travel is mainly by bus and rail: Tallinn–Tartu buses take about 2 hours, Elron railways cover the main cities, and Lux Express and other buses offer free Wi-Fi and charging points (subject to operators' announcements); the Tallinn–Helsinki ferry takes about 2 hours and is the usual way to and from Finland. Tallinn city transport is mainly trams, buses and trolleybuses; the old town is essentially on foot, and tram 4 runs from the airport straight to the centre. Ticketing: visitors do not enjoy Tallinn residents' free-travel policy and must buy tickets; officially announced indicative fares are about 2 euros for a 1-hour ticket, 5.5 euros for 1 day, 9 euros for 3 days and 11 euros for 5 days, and Tallinn Card holders travel free within its validity; on boarding you must tap or scan at a validator, validating on every boarding — failure to validate, if checked, incurs a fine of about 40 euros, subject to official announcements. Rural and island buses are infrequent, even less so at weekends; Saaremaa requires a ferry or small-plane connection — check times in advance.