Finding your way
The Danube separates Buda, with the castle hill to the west, from flat Pest to the east. The bridges can be crossed on foot; the Chain Bridge is the oldest.
Getting around
The BKK network has four metro lines; line M1, opened in 1896, is one of the oldest in the world. Tram 2 runs along the Danube on the Pest side. Tickets: bkk.hu.
Money and language
The currency is the forint (HUF), not the euro. The official language is Hungarian.
Baths
Budapest has several historic thermal baths; entry conditions and prices are on their official websites.
Emergencies
European emergency number: 112.
Further reading
General information, without hours or prices. For details, see Wikivoyage (content under the CC BY-SA 4.0 licence) and official websites.