jula`s abyss at the end of the gornja dobra river canyon - ogulin, croatia / Đulin ponor na kraju kanjona rijeke gornje dobre

abyss adventure ancient backdrop beautiful beauty canyon cave construction croatia dark deep dobra dobre end environment explore famous formation geology gornja gornje gray ground hidden hole holy hrvatska julas kanjona kraju landscape limestone mountain natural nature ogulin outdoor outdoors ponor rijeke river rock rough scenic secret speleology stalactite stalactites stalagmite stone stones surface tour tourism trail travel under underground vacation view wall water white Đulin