The river Zrmanja is the southeast border of Nature Park Velebit. The flow of the river is rich in enchanting scenery throughout its full length of 69 km. It consists of canyons up to 300 m in depth, caves, tufa formations and numerous waterfall areas. As a tourist attraction, Zrmanja is suitable for numerous sporting activities out of which the most exciting are white-water rafting, foot paths and cycling tours.