Kiršoniai stone is situated in Kiršoniai village, near Pabiržė town, Biržai District. Its composition is reddish granite, in dimensions of 5.05 m in length and 3.44 m width. It is the largest boulder in the territory of Biržai Regional Park and one of the largest in Biržai district. It was brought to Biržai region by the glacier during the last ice age, 10,000 years ago.
In 2016, Kiršoniai stone was declared as Nature Heritage Site by the Minister of Environment of the Republic of Lithuania.
Photo credit: M. Venskus