Šaltinės kallinės - another complex and mysterious natural curiosity, valuable from the ethnographic, cultural and hydrogeological point of view, can be found on the "side" of the village of Strėva, on the left bank of the river flowing into the lake of Stanka (southwestern region). A small hill overgrown with fir trees and pressed by the wind with its roots uprooted, rising above the water of the Stanka lake for about 4-5 m. It is like a small island plowed by flooded debris. At the Šaltinė hill, the corner of the Stanka atabrad is perhaps the most crowded with silt, sapropel, heavily overgrown with aquatic vegetation. The foothills of the higher hills are wet and springy. The streams of water, which have just escaped from the underground in the damp spruce, are greedily absorbed again by the shores of the swampy lake. The hill of the springs is a fragment of the old lake terrace that has remained "unwashed" by the flowing water streams to this day. Unlike now, then Strėva channeled water not on the eastern but on the western foot of this elongated hill.