The central area of Amsterdam is fairly compact and easy to get around on foot. The GVB public transport office at Central Station has route maps and a guide to the ticketing system, which is based on zones, with the same ticket valid on trams, buses and metros. After midnight, night buses run from Central Station to most parts of the city. Taxis are among the most expensive in Europe and renting a car is not recommended. Streets in the city centre are narrow and awkward to navigate, and parking is limited and expensive. The ideal way to get around is by bicycle. Visitors will find several rental agencies around town.