Devil‘s Pit (Velnio duobė)( Aukštadvaris forest district, Aukštadvaris regional park). This is a nature monumento and a mythological-sacral object of cultural heritage. Origin of this pit is uncertain. Its depth is about 40 meters, diameter at edge – 210 meters, and diameter at bottom – 63 meters. There is a 9.5 meters thick peat layer at the botėtom of the pit.