Delago Cave is one of the most inviting caves in the Oszoly massif of the Pilis Mountains - spacious, dry, and comfortable enough that climbers and hikers have used it as a bivouac shelter for generations. Its entrance, visible from afar on the rock face, opens into a passage with surprisingly elegant natural formations.

The passage stretches about 17 metres, gently rising toward the back where it ends in a collapsed chimney reaching toward the surface. Inside, you can spot spherical dissolution features likely shaped by ancient thermal waters, and near the entrance the white, dense Dachstein limestone reveals fine Megalodus shell impressions. In winter, ice stalagmites often form on the walls, while the cave stays completely dry year-round, making it pleasant to visit in any season. Thanks to the climbers who regularly practice nearby and bivouac inside, the cave tends to stay clean.

• Csobánka, Margit-liget area — follow the path along the base of the Oszoly rock face 55 metres north from the distinctive Delago niche, then climb the side trail about 15 metres in elevation, easy to moderate
• The entrance sits at 35-40 m altitude, close to the marked hiking trail from Margit-liget

• The cave can be visited in ordinary hiking clothes, no special caving gear needed
• The entrance is hard to spot despite the cave itself being wide and roomy
• Nearby, 35 metres away at a bearing of 30° and 2 metres higher, lies the entrance to Delago-Rókalyuk cave

The cave was first explored and expanded in the late 1920s by members of a Budapest mountaineering and skiing club, who dug it out to create a proper overnight shelter — remnant rodent bones later found in its clay fill confirm its long history as a natural refuge.