Discovered in 1818, the largest natural curiosities in Poland. It is located 15 km from Puck, in the village of Mechowo, on the edge of the Darżlubskie Forest. The largest cave is about 61 meters long. In the middle of the upper corridor, there is a chamber crowned with a dome of extraordinary colors and stalactite formations, one of which, due to its shape and color, is called the Bleeding Heart.