Óra-fali-sziklaodú is a small rock cave tucked into the cliffs of Oszoly in the Pilis Mountains, and it is a real find for adventurous hikers who don't mind a bit of scrambling. Its elliptical entrance is visible from far away, yet reaching it takes some climbing skill.

The cave formed in Upper Triassic Dachstein limestone under phreatic conditions, giving it smoothly corroded passages. Two small blind chimneys rise from the main passage, and fossil flowstone can still be seen coating the walls. The interior remains almost entirely untouched, though a dense, thorny thicket growing on the cave floor makes exploring it quite a challenge. The surrounding Oszoly ridge offers the classic Pilis mix of rugged limestone crags, dense forest, and open views over the Csobánka valley, especially rewarding in spring and autumn light.

• From Csobánka - hike toward Oszoly ridge, duration depends on route, difficulty: demanding (climbing required to reach the entrance)

• The cave entrance can only be reached by rock climbing
• Thick thorny shrubs on the cave floor make entering the interior difficult
• The site lies within the Danube-Ipoly National Park

The cave takes its name from the nearby Óra-szikla rock tower, and it was first recorded under its current name in speleological literature in 1997.