Denevéres Cave is a small but fascinating cave in the Oszoly massif of the Pilis Mountains, accessible to any hiker without special equipment or permits. It offers a genuine taste of cave exploration without the risk, making it a perfect stop for curious travelers of all experience levels.

The cave consists of two large, dome-shaped chambers connected by a low passage. In the first chamber, a natural chimney breaks through the ceiling and reaches all the way to the surface, letting daylight filter in. The second chamber features interesting montmilch deposits and fossil dripstone formations within the Upper Triassic Dachstein limestone. True to its name (denevér means bat in Hungarian), the cave is home to bats, so visitors should move quietly and respectfully. In winter and spring, following snowmelt, the rear chamber stays damp, adding an extra atmospheric touch to the visit.

How to get there

• From Csobánka — follow the trail up Oszoly toward the Óra-fal (Clock Wall), then head north to the second large rock group; easy to moderate route
• The entrance lies 20 m from Pénzes Cave (Pénzes-barlang), 8 m lower, at a bearing of 325°

Practical information

• No permit is required to visit
• No caving equipment is needed - the cave is easy to walk through
• Bats live in the cave - keep quiet and avoid disturbing them
• The cave is almost completely untouched - please respect its natural state

The cave has been studied since the late 1960s by the Szpeleológia caving group, and its current name first appeared in literature in 1974 - earlier it was also referred to as Denevér-barlang or simply the second cave north of Óra-fal.