1984 emigrated first 200 visitors from Iserlohn region by providing the romantic candlelit Dechenhöhle listening in the larger halls musicians, who lectured Christmas melodies and well-known carols to sing along. 2016 finds this event held for the 33rd time. 2007 there were 4000 visitors from all parts of North Rhine-Westphalia, who enjoyed the sound of music on the fantastic stalactites and sparkling crystals.
For many visitors, it has already become established tradition to visit at Christmas which even in winter 10 degrees warm underworld and conclusion; in the chapel grotto before the “Holy Family” called concretions “Oh How Joyfully, …” to sing. Some replaced the cave Christmas now even the Christmas church attendance. The children are allowed to bring their course St. Martin lanterns (elec. Lighting!).
It was picked up an older tradition to celebrate Christmas projector lights in caves. 1663 celebrated the French ambassador in Constantinople Opel, Marquis de Nointel, in a cave on the Greek island of Antiparos with 300 people at Midnight Mass. All participants had to climb down on ropes to shaft-like cave entrance. Similar hardships take cavers in Catholic countries to be able to celebrate Christmas under the earth can. Also known is the Christmas Mass in the tourist accessible cave “Grotte des Demoiselles” in southern France.
According to the tradition of the Eastern Church Christ was born in a cave. In times of need people fled again into nearby caves and there celebrated the Sunday Mass. Designations such as “chapel”, “church”, “altar”, “Holy Family”, “Mary”, etc. for cave halls and stalactite formations bear witness not only to the imagination of visitors but also for close connection with Christian symbolism.