Biržai is located at the confluence of the Apaščia and Agluona rivers. Four hundred years ago, these rivers were dammed up, and Širvėna Lake is, therefore, possibly the oldest artificial lake in the world. This lake is about 400 years old. Now here you will have a chance to walk along the 525 m long pedestrian bridge. Biržai has always been connected with the aristocratic Radvilų family; when M. K. Radvila built a castle here in the 16th century, the town became Lithuania's most important defensive outpost. The castle was captured many times during the war with Sweden, and was blown up in 1704. It has now been restored and is home to a library and a fascinating Folk Museum.
With the impoverishment of the Radvilų family, Biržai was given over to Count Tiškevičius, who built the splendid Classic Astravas Palace on the northern bank of Širvėna Lake. At present, the Palace is being restored, but it can still be visited and you may wish to attend one of the concerts regularly held there.
This is the land of traditional, homemade beer. Biržai is famous for its mineral waters, its medicinal mud and the Likenai Health Resort. You can take one of the cures, have your joints articulated, spinal column and muscles treated. Five kilometers away from Biržai is the Astravas Estate which you can reach by traversing a wooden bridge over the lake.