Underground Cologne: Groß St. Martin and Ubiermonument | RegioColonia
Sun, 2 Aug 2026 — Sun, 6 Sep · 14:00
Groß St. Martin, Cologne, Germany
Explore the underground secrets of Cologne on a guided tour by RegioColonia. The route takes you through the church of Groß St. Martin and the Ubiermonument – two sites that preserve fascinating traces of the city's ancient and medieval history.











