The Lake Dysnai is the second largest lake in Lithuania.
With an average depth of only 6 m (20 ft), it is one of the shallowest lakes in Lithuania.
It is located in the Ignalina district municipality, about 3 km (1.9 mi) south of Dūkštas city. Dūkštas Train Station is the closest train station to the Lake Dysnai (route Vilnius-Turmantas). It is approximately a 2 hours ride by train from Vilnius, the capital of Lithuania.
Dysnai is connected with the Lake Dysnykštis.
Dysna River, a tributary to the Daugava River, flows through the Lake Dysnai.
Since 1988, the lake has hosted annual festival Dysnai by workers of nearby Ignalina Nuclear Power Plant.
