Baradla Cave — Wikipedia

The Baradla Domica cave system is a large cave system in northern Hungary. As part of the Aggtelek Karst, it extends more than 25.5 km (25,500 m) and includes the 5.3 km (3.3 mi) Domica Cave. A significant part of the cave has varied colors and shapes providing an unparalleled spectacle of decorative stalactites. The cave system has been visited and researched for centuries because of its famous ornate speleothems. Natural entrances to the cave have been open from ancient times, and there are traces of Neolithic occupation. However, the first written mention of the cave dates from 1549....