Bad Soden is a popular residential town for commuters working in Frankfurt am Main. It is known for its various springs, which contain carbonic acid gas and various iron oxides. The waters are used both internally and externally, and are actually quite widely exported. Soden lozenges (Sodener Pastillen), condensed from the waters, are also in great demand. Bad Soden has a large and well-appointed Kurhaus, an Evangelical and a Roman Catholic church, and a small hospital. It also has a residential building by the architect Friedensreich Hundertwasser.