The visitor centre is designed to present a unique region where the earth’s surface is actively forming, constantly changing the landscape. Here is brief information about incredible phenomena in one place: the ground collapses after the groundwater have washed away the gypsum deposits in the depths. Mysterious sinkholes are formed: some are dry (the famous Cow’s Cave (Karvės ola), where the structure of the earth’s layers can be observed), and others are turned into lakelets with sulfur bacteria visible with the naked eye (Kirkilai lakelets). In the visitor centre of the park, the unique landscape, exceptional natural phenomena, honourable history, old traditions, crafts, culinary heritage of the Biržai region and local beer production traditions are intertwined into one harmonious whole. The Biržai Regional Park Visitor Center has an exposition about a land famous for its sinkholes, collapses and interesting geological processes - engaging and intriguing. The illusion created in the visitor centre as if you were in a sinkhole: “welcoming” cold glass reception, “feeling” the change of borehole depth and getting to know the change of geological layers, interactive stands - games “The development of the process of sinkhole”, “Karst lakelets ecosystem”, hourglass imitating the sinkhole collapse, other stands depicting sinkholes before and after the collapse, exposing minerals and rocks.