Deutsches Höhlenmuseum, Cave science museum in Iserlohn, Germany

The Deutsches Höhlenmuseum occupies a former railway station on the Letmathe–Iserlohn line in the Grüne district of Iserlohn. Its 600 m² exhibition, opened in June 2006, holds display cases of stones and bones, life-size replicas of a cave lion and a cave bear, and copies of cave paintings from across Europe. Landscape miniatures, lit models, an aquarium of cave fish and a small cinema fill the rooms, and the building serves as the gateway to the Dechenhöhle.

The collection began in 1967 as a private assembly in a local inn and later moved to the Dechenhöhle site before opening in its current location in 2006. Moving into the repurposed railway station allowed for a professional presentation of the growing collection of cave finds and minerals.

The museum displays reproductions of European cave paintings and life-size models of extinct animals that show why caves mattered to early humans. These exhibits help visitors understand the deep connection between people and underground spaces across thousands of years.

The museum is open Tuesday to Sunday from 10 am to 5 pm. It occupies the former railway station on the Letmathe–Iserlohn line, and the Letmathe–Dechenhöhle stop is served every half hour or hour by the Ruhr-Sieg-Bahn from Hagen and the Ruhr-Lenne-Express from Essen. The building also serves as the entrance to the Dechenhöhle.

The darkened "Klangraum" plays recorded water dripping onto stalagmites, the mineral columns that grow upward from a cave floor. The museum opened in June 2006 on 600 m² in a former station on the Letmathe–Iserlohn line, and its building doubles as the entrance to the Dechenhöhle.