Budapest service in and around Budapest, three lines of which are operated under the name HÉV. The river Danube flows through Budapest on its way from Germany to the Black Sea. The river is easily navigable and so Budapest historically has a major commercial port at Csepel District and at New Pest District also. The Pest side is also a famous port place with international shipping ports for cargo and for passenger ships. In the summer months, a scheduled hydrofoil service operates on the Danube connecting the city to Vienna. BKK (through the operator BKV) also provides public transport with boat
Budapest the nonprofit Budapest Festival and Tourism Center at its info-points. The info centers also offer the Budapest Card which allows free public transit and discounts for several museums, restaurants and other places of interest. Cards are available for 24-, 48- or 72-hour durations. The city is also well known for its ruin bars both day and night. Budapest has many municipal parks and most have playgrounds for children and seasonal activities like skating in the winter and boating in the summer. Access from the city center is quick and easy with the Millennium Underground. Budapest has a complex park system,