San Marino has no airport and no railway; external transport relies entirely on roads. Most commonly, take a bus uphill from Rimini railway station or seafront in Italy, about 45–50 minutes; a single fare is on the order of a single-digit number of euros and a return ticket about ten euros, with frequencies varying by season between every half hour and every hour, subject to the operator's announcements. Driving from Rimini via the SS72 takes about 35 minutes uphill; the hilltop car park is below the walls, parking costs on the order of a single-digit number of euros per hour, and after parking, take the cable car or lift up to the old town. There is no general taxi service in the city; a taxi from Rimini costs tens of euros one way, suitable late at night or when catching the last bus. Inside the old town, everything is on foot; streets are steep with many cobbles, so be sure to wear non-slip shoes. There is also a tourist train connecting San Marino City and Borgo Maggiore, suitable for visitors who do not want to climb. To board a bus, hail it at a designated stop and ring the bell in advance to alight; no smoking on board and do not disturb others. Fines for illegal parking and travelling without a ticket are subject to official announcements.