Jaskinia Mroźna, Karst cave in Kościeliska Valley, Poland
Jaskinia Mroźna is a karst cave in the Kościeliska Valley in Poland, stretching 773 meters through limestone formations at an elevation of 1100 meters. The main passage runs through several underground chambers and corridors formed by natural erosion over time.
Stefan Zwoliński and Tadeusz Zahorski discovered the cave in 1934 during an expedition in the Kościeliska Valley. The first explorations between 1934 and 1937 mapped only 64 meters of corridors, with more passages charted in later years.
The name refers to the freezing conditions inside and the connection to other cold caves in the valley. Visitors today notice the cool air and the silent passages that locals have known for generations.
The cave is accessible from May through October, with the main passage easy to walk and most visitors completing the tour in about an hour. The entrance sits on a mountain trail, so sturdy footwear and warm clothing are advisable since the temperature inside remains low year-round.
The constant temperature of 6 degrees Celsius (43 degrees Fahrenheit) year-round creates conditions for small underground lakes that form in the deeper sections. These cool waters remain icy even in summer and mirror the rock ceiling above.
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