Stockholm is easy to navigate, with an excellent public transport system made up of buses, metro lines, trams, and ferries. The metro is generally the most convenient way of getting around the city. Tickets are valid for all types of transport and can be purchased from stations and newsagent kiosks. One and three-day passes are good deals for those planning to travel a lot. Driving in Stockholm is easy compared to most large cities, and drivers need to be aware of toll passages and an overall scarcity of parking. Walking or cycling are often the best options for sightseeing in the city centre.