The Dechen Cave (German: Dechenhöhle) in Iserlohn, Germany is one of the most beautiful and most visited show caves in Germany. It is located in the northern part of the Sauerland at Iserlohn (Grüne district). 360 metres of the 870-metre long cave have been laid out for visitors, beginning at the spot where, in 1868, the cave was discovered by two railway workers.