Developed hot spring pool · Germany
Carolus Thermen
Germany
Last updated
- Type
- Developed Developed hot spring pool
- Water temperature
- 117°F (47°C) at the source
- Cost
- Paid entry (check current price)
- Hours or season
- 09:00-23:00
- Clothing
- Not recorded
- Nearest town
- Aachen
- Coordinates
- Pools or sources
- 1
- Very hot: above comfortable soaking temperature for most people. Enter slowly.
About Carolus Thermen
Carolus Thermen is a developed hot spring pool in Germany, on the edge of Aachen.
The temperature at the source has been recorded at 117°F (47°C). That puts it in the "too hot to enter at the source" range. Water this hot can burn skin quickly. Soaking pools are usually cooled by mixing with creek or tap water. Never enter the source itself. At developed sites the soaking pools are normally cooled to a comfortable level, so the pools you sit in will be cooler than this figure.
This is a developed site with built pools, tubs or a bathhouse, so there is usually an entry fee, set opening hours and basic facilities.
Water temperature
Too hot to enter at the source. Water this hot can burn skin quickly. Soaking pools are usually cooled by mixing with creek or tap water. Never enter the source itself.
Readings come from OpenStreetMap mappers, and other public sources. Temperatures change with season, flow and pool design. See our soak temperature guide for safe soaking times.
Map and directions
Red marks Carolus Thermen. Other colored dots are nearby springs in this directory. Coordinates: 50.78306, 6.09683.
Getting there
- Nearest town: Aachen.
- Planning from a city? See hot springs near Aachen, Germany.
- Use the directions buttons above for a driving route. Final roads to many springs are unpaved, seasonal or closed in winter, so check road conditions before you go.
Hot springs near Carolus Thermen
- Roetgen Therme Not recorded
- Thermae 2000 76°F
- Therme Euskirchen 91°F
- Claudius Therme Not recorded
- Kristall Rheinpark-Therme Bad Hönningen 95°F
- Sentosa Spa Privatif Not recorded
Before you go
- Check the operator, land manager or park website for current hours, fees and closures. Details in any directory can go out of date.
- Keep your head above water. Warm fresh water can carry Naegleria fowleri, a rare but deadly amoeba that enters through the nose.
- Drink water, limit soaks to 10 to 20 minutes at a time in very hot water, and skip alcohol.
- Read our hot spring etiquette guide and safety guide.
Frequently asked questions
How hot is Carolus Thermen?
The temperature at the source has been recorded at 117°F (47°C), which is too hot to enter at the source. Water this hot can burn skin quickly. Soaking pools are usually cooled by mixing with creek or tap water. Never enter the source itself.
Where is Carolus Thermen?
Carolus Thermen is in Germany, at Aachen. The GPS coordinates are 50.7831, 6.0968.
Is Carolus Thermen free?
No. It is recorded as a paid site. Check the operator's website for current prices and booking rules.
What hot springs are near Carolus Thermen?
The closest listed spring is Roetgen Therme, about 10 miles south. Thermae 2000 is about 13 miles away.
What should I bring to a hot spring?
Water to drink, a towel, sandals with grip, a bag to pack out trash, and warm layers for after your soak. At primitive springs bring a headlamp and tell someone where you are going.
Sources and corrections
This listing combines OpenStreetMap. Data last refreshed August 2026. Source 1 Source 2 Source 3 Source 4
Visited recently? Send a correction, such as a temperature reading, fee, closure or photo. If you look after this spring and want it removed, see removal requests.