Here you can read about the expedition of Speleoclub Bobry Zagan, at Tennengebirge, where they discovered 2km of new galleries in Jack Daniels cave, with climbing a 30m high chimney at -350 (the cave is -750). The expedition consisted of dozen cavers, and also made some surface prospecting, where they discovered 14 new caves, the deepest one is -70m, unfortunately all without the chance of easy continuation.