Bad Kissingen is a German spa town in the Bavarian region of Lower Franconia and seat of the district Bad Kissingen. Situated to the south of the Rhön Mountains on the Franconian Saale river, it is one of the health resorts, which became famous as a "Weltbad" in the 19th century. In 2021, the town became part of the transnational UNESCO World Heritage Site under the name "Great Spa Towns of Europe", because of its famous mineral springs and its architecture exemplifying the popularity of spa resorts in Europe during the 18th through 20th centuries.