Sas-kői-hasadékbarlang is a small crevice cave tucked into a rock face in the Visegrád Hills, offering a glimpse into the hidden geology of this part of Hungary. It's a spot for curious explorers rather than casual walkers, given its narrow and challenging passage.

The cave formed as a narrow fissure running almost parallel to the rock wall. Its entrance opens from a ledge about 5 metres up the cliff face. Inside, the crevice is dramatic but tight - beneath the visible section lies a long, widening fissure that plunges deeper into the rock, though it can't be entered because its opening is too narrow. The entire cave measures just 5.1 metres in length and 1.3 metres in height, making it more of a geological curiosity than a place for extended exploration. The surrounding landscape of forested slopes and rocky outcrops typical of the Visegrád Hills adds to the atmosphere, especially pleasant in spring and autumn when the woods are less overgrown.

• Szentendre - approach via the trails of the Visegrád Hills, difficulty: moderate due to the rock face and the ledge access
• Reference point: the Sas-kői-kisbarlang, located about 60 metres to the east

• Located within Duna-Ipoly National Park
• The deeper fissure beneath the cave cannot be entered - its opening is too narrow
• Caution is advised near the rock face and ledge at the entrance

The cave was first documented in 1997 by researchers led by Imre Gönczöl, who also drew its map - today it's counted among the 101 known caves of the Visegrád Hills.