The Strėva collapse, also known as “Zapadla jama” by local residents, is an interesting pit of termonary origin. The area of the collapse is 1.5 ha, the length is 150 m, the maximum width is 100 m, the height of the slopes is 20 m. It is a hole in the shape of an irregular bowl. The water level at the bottom of the pit is 0.3 m below the ground. It's said that there was once a pub here where the devils would party. One night of fasting, the devils were having a wedding. As soon as the cock healed, the pub disappeared with all the devils. Sometimes there are strange sounds out there, too.