Wetter Bad Soden-Salmnster is a town in the Main-Kinzig district, in Hesse, Germany. It is located on the river Kinzig, approximately 40 km (25 mi) east of Frankfurt am Main. The town is known for its thermal springs, which have been used for medicinal purposes since the 16th century.
The thermal springs in Bad Soden-Salmnster are rich in minerals, including sodium, calcium, and magnesium. The water from the springs is said to have therapeutic properties, and it is used to treat a variety of ailments, including rheumatism, arthritis, and skin conditions. The town is also home to a number of spa resorts, which offer a variety of treatments based on the thermal waters.