1. Velebit
Velebit is a speleologist's dream, and after the discovery of Lukina jama which is 1392 meter deep and among the first twenty deep caves on the world, Velebit is becoming more and more interesting to numerous foreign expeditions. The reasons for this are many insufficiently explored caves and the probability that there are still more of them undiscovered. There is the recently discovered Velebita jama with the longest underground vertical shaft on the world (over 500 meters), then the Slovačka jama etc. Except in tents in base camps, one may find accommodation in the lodge on Zavižan or in some of the trekkers' shelters.

National park Sjeverni (North) Velebit

2. Istra
Differently from Velebit, the caves in Istra have already been „explored“, but that does not mean they are not interesting. Istrian caves are warm, with a lot of decorations and rather demanding, so it is good to have an experienced guide when one starts to explore Istrian caves and pits.

Underground halls, lakes, creeks, gorges, vertical pits, cracks and fossils will delight every visitor. In Istrian caves and pit beside natural beauties there are also very diverse animals and plants (fish, frogs, doormice, little crabs, blind mice), and the most interesting is the “human fish”, Proteus anguinus, an endemic species living only in this karstic areas.

Te cave of Pazin has become world famous, as it has been celebrated by Jules Verne describing it in his novel „Mathias Sandorf“. Until now, about 1500 caves are known, and every year about ten new ones are discovered.  Ćićarija in the north of Istra is a separate karstic entirety where the deepest cave of Istra is situated, the abyss Rašpor, 361 meter deep.

Near the small town of Roč there are the abysses Krkuž and Gragorinčići. The longest cave in flish is Piskovica in the central part of the peninsula, 1036 meters long. In the vicinity is also the 273 meter deep Marfanska pit consisting of 2045 meters of explored canals and is also the longest one in Istra.  The largest hall adorns the Batluška pit, 200 meters long and 150 wide and 60 meters high.

The north-western parts are special by a row of abysses in the contact area of flish sediments and limestone. A very picturesque abyss near Šterna is 231 meter deep, and it is especially beautiful in the rain period when at the bottom of the pit a waterfall is created, and before disappearing in the deep of the earth, it makes a small lake. There is also an abandoned old mill nearby.

The karstic area of western Istria is very interesting as it is covered with red earth so dripstone and crystal underground are often expressively red coloured. Beside pits, caves are also very interesting speleological sites. For their accessibility, the staying f men and animals in them goes very far back into the past, so that many of them are today interesting archaeological and paleontological finding sites: Šandalja, Vergotinova, Romualdova, Trogrla… are only some of them.

Tourist Association of the Istra County

3. Biokovo
The deepest pit on Biokovo is the 778 meter deep Amfora. Impressive, rough environment of Biokovo is characterized by dry pits, although in some places one may even in the middle of summer climb in ice. Recommendation is to use services of experienced guides.

Nature Park Biokovo

4. Lika
Speleologically extremely interesting area, as it has a lot of abysses, springs and unexplored areas of great potential. The most interesting pits are Punar in Luka and Munižaba near Gračac, and very interesting is also Đula Medvednica under Ogulin. This is the longest cave in Croatia, whose over sixteen kilometres of canals make a maze where one can be very easily be lost.

Tourist Association of the Lika – Senj County

Important notice: All the above mentioned caves and pits are not equipped for a tourist visit and are accessible only for trained speleologists in registered and approved expeditions. Visiting, seeing, exploring and all other activities in speleological object or their parts above the ground is prohibited without a valid permission of the competent ministry and approval of competent institutions.

However, „simple“ tourists should on their way to Split or Zadar, by all means stop for a while and visit Cerovačke špilje, near Gračac and the Manita peć in Paklenica which is also open for tourists. The oldest cave „equipped for tourists“ is the Modra špilja on the island of Biševo.

Beautiful and exciting is also the Lokvarka near Lokve in Gorski kotar, while the most adventurous cave with a tourist concession is the Modrič špilja in Rovanjska, near the bridge of Maslenica. If you want to experience one of the most beautiful caves in Croatia, meet the County of Karlovac, that is the cradle of Croatian speleo-tourism.

The Barać caves at Nova Kršlja in the vicinity of Rakovica, famous for their lush calcite decorations, were the first ones in Croatia open for tourist as far back as 1892. They were visited by carriages while travelling further to the lakes of Plitvice.

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