Lithuania is a very friendly country for bicycle tours. Although there are not too many specially paved bicycle paths, you can find a lot of picturesque side roads with close to zero car traffic.
We started the ride from Suderve, near Vilnius. Chose side roads and forest paths to Kernave and on the way back, we were tired and decided to go the fast road.
Here you see
https://www.wikiloc.com/cycling-trails/zemaguliai-kernave-49182238