The River Neris flows through Vilnius, Belarus and Kernavė before joining the Nemunas river. 234 km of the 509 km long Neris river runs through Lithuania and it is 100 meters wide where it passes through Vilnius. The Neris is known for being a very long and old river.

1. River Neris. It is in Vilnius, Belarus, Kernavė. The
Neris flows into the Nemunas. 234 km of Neris
is in Lithuania. The length of the river is 509 km
and the width of Neris is 100 meters in Vilnius.
It's famous because it's very long and old.