Jaskinia Kasprowa Niżnia (Tatra Mts)
A 3.1 km cave (47 m vertical range) whose northern branch ends in a chain of permanently flooded sumps with short dry sections between. Most sumps were dived in 1996 and 2002; Krzysztof Starnawski's January 2002 campaign added 180 m of new passage in four dives. Syfon Warszawiaków is reported as about 333 m long and 22-24 m deep (sources differ), among the longest sumps in Poland. Nobody is reported to have pushed beyond his 2002 limit.
depth: 0–24 m