Grūda (lake)
Grūda is a lake located near Ašašninkai village between Lithuania and Belarus, 30 kilometers south-east of Druskininkai. The lake is divided between the two countries. Lithuania controls around 70% of the lake. The lake is a popular spot for fishing. The average depth is around 2.5 meters while the maximum depth is more than 5 meters. References

Gruda
Gruda
Belarus–Lithuania border