Lombrives

Lombrives cave is located in Ornolac-Ussat-les-Bains, at the eastern edge of the Pyrénées Ariégeoises Natural Regional Park, Ariège, southwestern France. Earliest excavations by Félix Régnault took place in the late nineteenth century that confirmed human occupation during the Neolithic. The Lombrives cave has been declared the largest or widest cave of Europe in terms of volume. Having a length of 39 kilometres it is certainly not the longest cave, compared to several other European sites, that exceed a length of over 200 kilometres .
However, the cave's subterranean passages, caverns and galleries are distributed on seven superimposed levels, the 80-metre-high Cathedral cave alone has the size of the Cathedral of Notre-Dame in Paris, "the rule of Satan" hall being four times as large.