
- Source temperature
- 52°C
- Bathing temperature
- 34°C
- Bathing
- Indoor / Outdoor
- Established
- 2001
Aachen's sulphurous springs supplied Roman baths and later Charlemagne's imperial court. The Carolus Thermen, opened in 2001 in the Stadtgarten, is the city's contemporary expression of that tradition, built around thermal water rising at over 50°C.
Balnevia view
Why visit
A calm, well-run bath in a historic spa city: thermal pools indoors and out, an extensive sauna world, and Roman and Carolingian heritage a short walk away in the old town.
Recommendations
Hotels nearby
Explore places to stay near Carolus Thermen Bad Aachen.
The water
Thermal water
- Source
- Aachen thermal springs
- Mineralisation
- Sulphurous sodium chloride thermal water
- Character
- Sulphur-bearing thermal water from the hottest spring system north of the Alps, used since Roman times.
Practical information
The sauna area is textile-free and ticketed separately from the bathing halls. Quietest on weekday mornings.
Location
Related places
More thermal baths in Germany

Erding/Germany
Therme Erding
Europe's largest thermal complex, built over a 1,900-metre-deep spring.
Bathing temperature 34°C

Baden-Baden/Germany
Caracalla Therme
Baden-Baden's modern thermal bath, opposite the historic Friedrichsbad.
Bathing temperature 34°C

Baden-Baden/Germany
Friedrichsbad
A neo-renaissance Roman-Irish bath from 1877 where the route through seventeen stations is the point.
Bathing temperature 34°C