Vyvieračka Hlbokô (Jaskyňa Hlbokô)
A powerful karst spring in a side valley of the Jánska dolina, south of Liptovský Ján in the Low Tatras National Park. The Štiavnica stream sinks underground and re-emerges here after 2.4 km of unknown passages; together with the Medzibrodie spring it drains Kráľova hoľa, which hides almost 30 km of explored caves. Only a few metres inside the 5 × 5 m portal the first sump begins. The cave, about 150 m long, consists of three water-filled chambers linked by a low canal, with small yellow-pink stalactites. V. Benický first explored it in the 1940s; on 17 October 2015 divers of Speleoclub Nicolaus and the Czech ZO 1-09 Niphargus cleared out wood and began detailed mapping.
depth: 0–6 m