1. The Danube River is one of Budapest’s most recognizable natural features, flowing through the heart of the city. It is the second longest river in Europe, flowing 1,774 miles from Germany to the Black Sea. The river has two distinct sides in Budapest, Buda and Pest, which are connected by a number of bridges, including the iconic Chain Bridge. Along the riverbank, you can find a number of popular tourist attractions, including the Hungarian Parliament Building, Buda Castle, Fisherman’s Bastion, and the Shoes on the Danube memorial. 2. The Danube River is not a specific location with working hours or a phone number, as it is a natural feature. However, many tours and boats operate on the river and have various schedules and contact information. It’s best to research individual companies or attractions to find out their hours of operation and contact details. 3. There are various ways to explore the Danube River in Budapest, including river cruises, sightseeing tours, and public transportation. Many boat companies offer guided tours of the river, providing information about the city’s history and landmarks as you float by. Public transportation options include the regular ferry service, metro line M2, and tram lines 2 and 47/49. Ticket prices vary depending on the service you use and the type of ticket you buy, but more information can be found on the Budapest Transport website.