Eye of the Earth Lake Poyshevo in Croatia. This small lake is the first source of the Cetin River in Croatia. This is a karst funnel with a depth of more than 150 meters, which is located on the northwestern slopes of Dinara near the small village of Cetin and 7 km north of the city of Vralik.
Water rising from the bottom of the funnel forms a river with a total length of 101 kilometers, the waters of which are filled with at least eight sources. It flows into the Adriatic Sea and is the deepest river in Dalmatia