Štrbački BukBesides cave diving, rafting, hiking and mountain biking, when it comes to National Park Una, all spotlight goes to the most beautiful waterfall in this part of the world. This 24 m long beauty will leave you breathless. It’s surely a jaw-dropping view.Štrbački buk waterfalls is near the villages of Kulen Vakuf and Orašac. This waterfall consist of several other waterfalls in the proximity. Natural waterfalls Štrbački buk constantly attracts nature lovers and many other tourist.