Gacka Valley is nestled in the heart of Lika, one of the most beautiful and tranquil regions of Croatia. If you have rented affordable accommodation in Otočac, you will easily find the source of the Gacka River and its valley, surrounded by the mountain ranges of Velebit and Mala Kapela. Gacka is one of the cleanest and coldest rivers in Europe, a paradise for nature lovers, anglers, and those seeking peace and authenticity. As a karst river, Gacka is the third longest sinking river in the world. The full splendor of the karst landscape shines here, with green meadows, forests, and mountain scenery lining this marvelous river, making the area ideal for hiking, cycling, and nature exploration. Traditional villages and old water mills along the river add charm to the region. The Gacka Valley symbolizes the connection between the people of Lika and nature. The Gacka River is known for its numerous springs and karst sources, which are located in a relatively small area. The most famous sources of the Gacka River are Tonković vrilo, Majerovo vrilo, and Klanac vrilo. Majerovo vrilo, near the village of Sinac, is the most famous due to the mills that are still operational, where you can buy homemade flour or polenta and enhance your stay by tasting traditional Lika specialties.