Nincskegyelem Cave, Pit cave in Vác, Hungary.

Nincskegyelem Cave opens in a quarry on the western side of Naszály, about a third of the way up a roughly 30-metre quarry wall. It formed in Upper Triassic Dachstein limestone and has a horizontal extent of about 27 metres, while most of its main passages run vertically. Its three large shafts lie about five metres from the outer quarry face.

The cave was opened by quarrying, not by deliberate exploration. On 7 March 2002, during an official site visit, Antal József and members of the Naszály Cave Research Group found the entrance and entered the passages. A detailed survey followed that year, and from 1 September 2005 a ministerial decree granted it strictly protected status.

The passages carry religious names: Purgatory, Hell Shaft, Heaven Shaft, Satan Shaft, Blessing Giver and the renamed Julianus Passage, a pun on the friar Julianus and the name Juli. The cave itself was first called Romantika Shaft Cave, then Nincs kegyelem (No Mercy) Shaft Cave, because a cavity opened in a working quarry usually faces destruction.

The narrow entrance opens about a third of the way up a roughly 30-metre quarry wall in the Sejce area of Vác, on the western side of Naszály. Entry is allowed only with the permission of the Duna–Ipoly National Park Directorate, and a full traverse of the cave requires rope-technical equipment. The three main shafts run within about five metres of the quarry face, and the entrance shaft has reached 25–30 °C in summer.

The cave's name means "No Mercy Shaft Cave", given because cavities opened by working quarries usually end up destroyed. Its passages carry religious names: Purgatory, Hell Shaft, Heaven Shaft, Satan Shaft and Blessing-Giver. A passage once called Juli-ánusz now appears as Juliánusz, a pun on the friar Julianus and the name Juli.