KRK, an island in the Kvarner Archipelago, the largest island of the Adriatic Sea; area 409 sq km (38 km lenght, width up to 20 km); population 16,402. North of the narrow part at the line Vrbnik - Punat spreads the lower, forested, more fertile and populated part of the island. The higher, southern part, is predominantly bare, interspersed with thick forests.