The river Una springs from a well under the forests and cliffs located in the small village of Suvaja in Municipality of Gračac. With its calm surface, it is one of the deepest and strongest karst springs in the world. An educational trail will guide you directly to the river spring. The spring of Una is a fairy tale turquoise-colored lake surrounded by forests and steep cliffs. With its calm surface, this lake is one of the deepest and strongest springs of this area. The first Una waterfall is located some 10 meters from the spring. Thanks to its incredible beauty and exceptional hydro-morphological value, in 1968 the lake and the canyon surrounding it, as well as 150 meters of downstream flow were named a protected hydrological monument of nature.
