Kétbejáratú-barlang, or the Two-Entrance Cave, is a small but fascinating cave tucked into the rocky slopes of Mount Oszoly in the Pilis Mountains. As the name suggests, it has two entrances, making a walk-through crossing a fun little adventure that anyone can manage without caving gear.

The cave formed in Upper Triassic Dachstein limestone under phreatic conditions, creating a gently sloping passage. The southern entrance is wide and oval, easy to walk into, leading to a gradually flattening chamber where narrow fissures begin. A few meters in, on the left, light already filters through from the second entrance. From there you climb a small step and mostly crawl over rock debris to exit through the low, flat northern entrance. The surrounding forested limestone crags of Oszoly are popular with hikers and rock climbers alike, offering a quiet, atmospheric setting in every season, especially beautiful in autumn light.

How to get there

• From Csobánka — the cave opens on the side of the fourth rock ridge north of the Óra-fal, facing the village, 120 m north and 20 m higher than the Rózsalugas passage; easy access, no technical climbing needed
• Reachable via hiking paths through the Oszoly rocks, a favorite area for local climbers and walkers

Practical information

• Located within Duna–Ipoly National Park
• No special caving equipment required to visit
• The cave is about 11 m long and 2–3 m deep

Fun fact: the cave was first surveyed in 1970 by László Kordos, and traces of old, weathered flowstone formations can still be seen inside.