Magura Cave
The 23rd deepest cave in the world
The 47th longest cave in the world
The Magura Cave is located in north-western Bulgaria close to the village of Rabisha, 25 km (16 mi) from the town of Belogradchik in Vidin Province. The prehistoric wall paintings of Magura have great resemblance with those of the Grotta dei Cervi in Italy, which are of exceptional expression and artistic depth and are considered the most significant works of art of the European Post-Paleolithic era. Guided visits are conducted by the staff of Belogradchik municipality, to which the management of the cave was transferred in 2012 by the Bulgarian Council of Ministers. In 1984, the site was inducted into UNESCO's tentative list of World Heritage.
Cave data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).