Jaskyňa zlomísk is one of Slovakia's most extraordinary underground worlds — a labyrinth of over 11 kilometres of passages carved into the Triassic limestone of the Low Tatras, adorned with spectacular multicoloured speleothems and alive with active underground streams. This is a place where nature has been sculpting in silence for millions of years, producing formations ranging from snow-white stalactites to deep rust-red stalagmites. Although the cave is closed to the general public, the surrounding Jánska dolina valley is a stunning destination in its own right.

The cave developed across three to four levels on the eastern slopes of the Kraková hoľa massif, just above the floor of Jánska dolina. The two entrances sit at 809 m and 854 m above sea level, nestled in dense forest. In winter the valley takes on an ethereal quality with frost and ice formations; in summer it bursts with greenery and birdsong. The nearby Bear Cave (Jaskyňa medvedica) makes this one of the most speleologically rich valleys in Slovakia.

• Liptovský Ján — starting point in Jánska dolina; a trail follows the Štiavnica stream towards the cave entrances. Moderate terrain, suitable for averagely fit hikers.

• The cave is not open for tourist visits — entry is permitted only for cavers with official permits.
• Protected area: Low Tatras National Park, Jánska dolina nature reserve; declared a natural monument in 2001.
• Four bat species hibernate here, including the greater mouse-eared bat — disturbance is strictly prohibited.

First explored scientifically in 1954 by speleologist Stanislav Šrol, the cave still surprises researchers — its lowest passages contain active siphons and underground lakes, and a dye-tracing experiment confirmed a hydrological connection with the neighbouring cave 'v Hlbokom', though no diver has yet managed to pass through the separating siphons.