Bad Honnef is home to a mineral spring called the Drachenquelle ("Dragon Spring") which was discovered in 1897. This discovery led to Honnef, as the town was called at the time, transforming from a wine-growing town to a spa town, adding the prefix Bad to its name. The mineral spring has been used for both drinking and bathing.
Since the 1980s Bad Honnef has developed into an important place for conferences in Germany. Because of the close proximity to the still internationally important Federal City of Bonn, many federal institutions are located in Bad Honnef.
The headoffice of the Nationalpark Siebengebirge project was also planned to be in Bad Honnef; however the project was doomed by a referendum on sept. 27, 2009.
Bad Honnef has the highest purchasing power of all towns in North Rhine-Westphalia, its percentage of millionaires is also one of the highest.
^ One or more of the preceding sentences incorporates text from a publication now in the public domain: Chisholm, Hugh, ed. (1911). "Honnef". Encyclopædia Britannica13 (11th ed.). Cambridge University Press. p. 659.