Weaver's Cave

Weaver Cave (Tkalca jama)—also known as Vaulted Cave (Jama pod velbom), Škocjan Cave (Škocjanska jama), and Inlet Cave (Zatočna jama)—is a 2,885 metres (9, 465 ft) long ponor cave in southwest Slovenia. It runs from the west (downstream) side of the Rak Škocjan Valley, where it has two entrances, and continues into Planina Cave. It is traversed by Rak Creek, part of the Ljubljanica source system. It thus forms part of the hydrological connection between Cerknica Polje and Planina Polje. Due to sumps, the stream of the Rak is very difficult to follow and was explored by divers only in 1974, when the majority of the cave was discovered in the course of a rescue expedition, and in August 2012.

Cave data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).