South of Brinje, near Letinac, is another extraordinary and mysterious site – the Siničić cave.
South of Brinje, near Letinac, is another extraordinary and mysterious site – the Siničić cave. It is a unique and extremely important prehistoric site in which, presumably, lived Palaeolithic hunters as early as 9,500 years before Christ. Evidence of this are the pictures on the cave walls, and the pictorial leptolical images 550 meters from the entrance, which to date have not been deciphered. Picture letters, discovered in 1997, is unique to Croatia and scientists have tried to decipher it several times. Some theories say that the notches like Germanic runes is actually a primitive lunar calendar dating back to 11,500 years ago, while the engraved crosses suggest a later Mesolithic sanctuary from the 15th century. Beyond the entrance to the cave is a spacious hall with the first siphon-lake, which in the spring, due to heavy rainfall, runs and springs out of the cave in the form of small waterfalls. Found in the cave were even ceramic items, animal bones, and the assumption is that this is one of the oldest traces of settlements in the Lika region and beyond.
Siničić cave is a protected cultural good, but continues to reveal its secrets and is a lure for all lovers of that which is historical, mysterious and unsolved.
Rokina abyss located near Jezerane, between two mountains of Kapela, is one of the favourite speleological locations and karst phenomena, well known among speleologists. The depth of Rokina abyss is around 100 meters, and is home to numerous and mystical underground water channels, which connected together form the largest underground river in Croatia. For decades various legends about Rokina cave, Rokinka or Rokača were told, where the story closest to the truth is the sad story of Roka, the grandmother who ended her life there. Also on the surface, next to the entrance, you can hear the powerful roar of water that flows deep underground.
Unlike Roka the grandmother, there is indeed a living world in the dark depths. Hidden from view and sun light, inhabiting Rokina abyss are endemic types of “human fish”, freshwater sponges and blind crayfish.
Rokina abyss has been subject of research since the early 1960s and to this day continues to intrigue.