Carolus Thermen
Aachen, Germany

About
Carolus Thermen is Aachen's thermal bath and sauna landscape at Passstrasse 79, drawing on the city's Roman bathing heritage. The Saunawelt runs nine saunas and saunaria, an oriental bath with hamam and three steam baths, and a sauna garden with its own pond; the sauna area is textilfrei with no swimwear days. Thermal pools and a spa sit alongside.
Good to know
- Runs aufguss sessions: a guided löyly ritual where an attendant fans the steam around the room on a schedule.
- Set up outdoors: weather is part of the experience, so dress for the walk between cabin and water.
- Pool on site: works alongside the sauna for swim-and-sauna sessions or a longer cool-down between rounds.
- Restaurant on site, so long sessions are the design. Food is part of the visit rather than a stop on the way home.
- Pairs the sauna with spa services like massage or a scrub, so a session can sit inside a wider visit.
- Urban venue: it sits inside the city rather than at a coast or lake. A session fits into a day in town.
Hours
- Mon-Sun 09:00-23:00
Thermalbad and Saunawelt share the hours; admission until 21:30, bathing until 22:30; 24 and 31 Dec 09:00-14:00, 25 Dec and 1 Jan 15:00-23:00
Common questions
Do I need to book Carolus Thermen?
No. You can turn up during opening hours without booking.
How much does Carolus Thermen cost?
Sessions are typically €25–50 a person.
When is Carolus Thermen open?
Typical hours are Mon-Sun 09:00-23:00. Thermalbad and Saunawelt share the hours; admission until 21:30, bathing until 22:30; 24 and 31 Dec 09:00-14:00, 25 Dec and 1 Jan 15:00-23:00.


