Bad Honnef (German: [baːt ˈhɔnəf] ^ⓘ) is a spa town in Germany near Bonn in the Rhein-Sieg district, North Rhine-Westphalia. It is located on the border of the neighbouring state Rhineland-Palatinate. To the north it lies on the slopes of the Drachenfels (“Dragon's Rock”) mountain, part of the Siebengebirge.