Caves length – 7,8 m, width – 2 m, height – 2 m. From this cave is coming out a source – Rūceklītis. Once a year – in May, it is buzzing like a bee. The scientists are saying that this sound arises when the water is falling into underground lake.
Address: Kārķu pagasts
GPS: 57.7843090, 25.5626315