This is one of the most outstanding areas in the entire Baltic States with active underground waterways which still, to this very day, dissolve local gypsum rock. Parts of the area collapse regularly, and there are legends about all of this. Underwater rivers, streams, the so-called Karvės (Cow) cave, etc., can be seen in the area.
Services
Services - recreational
Nature trail
Hike along the Smardones šaltiniai stream, with a walking bridge across Lake Širvėnos (500 m). Hike other trails around the little lakes in the area. There’s a visitor centre in Biržai. For more information: www.birzuparkas.lt (available in English).
