Drábské světničky, Rock castle ruins near Dneboh, Czech Republic.

Drábské světničky is a medieval castle ruin made of sandstone blocks rising 177 meters (581 feet) above the Jizera River valley in the Bohemian Paradise region. The site features multiple chambers carved into the rock face, with the vertical cliff serving as a natural defense system.

Founded in the second third of the 13th century during Cistercian colonisation from Hradiště, the castle guarded monastic land and part of the Pojizeří trail. Finds show use into the 14th century and faintly in the 15th, when restoration during the Hussite wars is considered. It was abandoned thereafter.

Petroglyphs carved into the rock include inscriptions from the 16th and 17th centuries, which together with written records suggest meetings of the Unity of Brethren and stays by Utraquist priests. The largest carved room is the chapel, whose rock-cut altar was uncovered in 1921.

The shortest approach is the blue-marked path from the Kavčina car park in Dneboh, about 0.6 km. From the Březina train stop on line 070 Prague–Turnov, the yellow-marked path covers 2.5 km. The upper circuit with ladders and bridges opens from 1 April to 31 October in daylight and closes in bad weather.

The carved spaces were reused long after the castle fell: petroglyphs from the 16th and 17th centuries, together with written sources, point to meetings of the Unity of Brethren and possible stays of Utraquist priests. Quarrying of sandstone blocks later altered the edges of some rocks and the castle forecourt.