The longest of them called Semujan Cave has the length of 32 m. Kapuas River, Borneo, Photo Grzegorz Kuspiel Tatra Mts. Sniezna Two divers carried out exploration in Wielka Sniezna cave. The aim of their activity was Syfon Magdy - a sump situated in a side series in the cave. Norbert Ziober dived through two previously known sumps. A narrow but tall fissure is situated behind them.
Further progress is still possible.
The authors of this article prepared an inventory of caves located in the Nida river basin. All the caves are developed in gypsum Miocene in age. 75 caves were surveyed with the total length of 1913 m. The authors have worked out a new system of numeration of caves situated in the Polish Jura. The system divides the Jura into several hierarchic units.