Zeljava - abandoned air base

Once known as one the largest underground military air bases in Europe, Zeljava is today a key part of the GWT2P cross-border tourist destination with two national parks - Plitvice Lakes and Una!

Licka Pljesivica 

Croatia's second longest mountain, Mount Licka Pljesivica is over 100 km long and covers an area of 453 square kilometers. Stretching from the Plitvice Lakes National Park to the River Zrmanja in the South of Croatia, Licka Pljesivica boasts a diverse and rich natural environment with many stunning landscapes and one of the most incredible views in Croatia - the one from the Gola Pljesivica Peak.

Built just under the Gola Pljesivica peak, Zeljava (Željava) underground air base is now positioned in the center of the GreenWay Tour 2Parks destination, on the border between two two partner local communities.

Mount Licka Pljesivica

The underground part, runway 4, and parts of the runways 1 and 3 belong to the Republic of Croatia, administratively the Municipality of Plitvice Lakes, while the runways 2 and 5 belong to Bosnia and Herzegovina, administratively the Town of Bihac.

Together with two national parks, both local communities are now the main partners and signatories to the GWT2P Cross-Border Partnership and Cooperation Agreement.

From the Initiative to the Realization of the Vision

More than seven years ago, the lead partner of the project, the Municipality of Plitvice Lakes, accepted the GWT2P initiative and expressed interest in taking over the Zeljava abandoned military airbase. In August 2014, the Municipality had approached the Ministry of State Property Advisory Program with GWT2P Development Project.

After years of calm anticipation during which we tried to introduce the location and sensitized the public to what we are trying to do right here, the best possible thing happened for all local residents in the region, and beyond. In 2019, Zeljava Airbase was assigned to the Municipality of Plitvice Lakes and the same happened across the border where the rest of the military base was assigned to our partner the Town of Bihac.

In the 21st Century, the abandoned military air base is preparing to become a significant contributor to sustainable development and inclusive green growth of our region. Residents of the surrounding local communities have sacrificed a great deal for this base: during construction, the villages of Veliki and Mali Baljevac were completely emptied and razed to the ground, and during the last war, Zeljava was a zone from which the besieged town of Bihac and the surrounding local communities in both countries were mercilessly attacked. Our vision is that the people and the local communities that gravitate toward Zeljava receive the greatest benefit from this valuable and once the most expensive man-made object.

Now, there's a big challenge ahead for us all; this is an opportunity for the millennium step forward towards a new paradigm that completely transcends artificial political boundaries, different values, worldviews, and ideologies. This capital man-made object can become a powerful engine of local and regional development and respond to the challenges imposed by the modern day life and environmental degradation; fully committed to the common good and well-being of all - through joint work and effort of all levels of local communities.

Zeljava is inwoven into the magnificent Mountain Licka Pljesivica, a true nature's gem highly worthy of preservation and our joint attention! Find more impressive facts about the mountain under Explore Local!

Zeljava Things to Do

Although not yet open to the public for security reasons, the airbase's surrounding area has some fun and interesting activities to offer - fine dining restaurants, hotels, traditional handicrafts, as well as great local guides who will gladly take you on a biking or a walking tour around the airbase. Since the offer is constantly changing and growing, the best thing you can do is to browse through our newest and updated information on all activities, as well as contacts of guides and organizers that can be found under Events and Activities / Monthly Experience Ideas. Local people are very friendly and interconnected, and will gladly refer you to more interesting activities in the area. 

By using these local tourist services, you will provide great support to the to the "keepers" of traditional heritage and to local villages social and economic revitalization!

A Bit About the Past

The construction of the Zeljava airbase started in 1968 and lasted for 12 years. The chief engineer was Mr. Dragoslav Sobotka. The task of designing a military base envisaged an accommodation for two to three reinforced squadrons of fighter aircraft (then modern MiG-21) with supporting areas, air traffic control, meteorological station and additional facilities that would be used to accommodate hunting aviation regiment comprising of three to five squadrons.
The estimated value of the property was 8 billion dollars and was the most expensive military investment in former Yugoslavia.

The position of the military base
The position of the underground military base and its geostrategic position was chosen after detailed research. As with all military facilities the main requirement was to be placed on the geostrategic base: deep enough in the national territory and at the same time equally distant from all important facilities and strategic objectives.

The morphological image and the position of this impressive massif with numerous valleys and ridges fully met those requirements. The terrain was an ideal natural barrier against surprise attacks and position of the mountain provided an opportunity for a tactical surprise because the planes could take off safely and unnoticed from the radar shadow of the mountain.


The exterior of the base had five runways, two ascending-descending and three ascending runways, and the barracks were located in the village of Licko Petrovo Selo that also served as the logistic base. Almost all members of the base lived with their families in the Town of Bihac where the whole quarter of the town, called Harmani, was made for the airport.

Željava airbase, one of the two airports in the former Yugoslavia with the 24-hour operation,  was home to the renowned 117th-Hunting Aviation Regiment, composed only of the best pilots.

The impressive characteristics of the military base:

  • three galleries to accommodate 58 aircraft linked together in the shape of the letter M;
  • vaulted galleries: length 350, 400 and 500 meters, width at the base about 20 meters and height 8 meters;
  • at crossings gallery height of 12 meters;
  • the total length of the underground tunnels: 3500 meters;
  • gallery profile and enters built to match the dimensions of the MiG 21;
  • its own source of electricity and water, electric, water and sewer networks;
  • equipment base allowed the autonomous use of the base up to 30 days;
  • two backup diesel-electric power plant of 1,000 kVA and 625 kVA;
  • 13 air chambers with a specially protected ventilation shafts (also spare exits;
  • interior rooms separated with 56 heavy armored doors;
  • heavy reinforced concrete doors at the entrance of the galleries were 1m thick, 9 meters wide, 21 meters high and more than 100 tons heavy, were placed in separate niches of the gallery and had built-in anti-shock valves;
  • the base was supplied with kerosene through its own, more than ten kilometers long and completely combat secured pipeline from military warehouses on the hill Pokoj near Bihac;
  • with space for decontamination, resistant to potential direct 20 kilotons nuclear attack. 

Monument to Human Ingenuity... or Not!

One of the largest and the most modern military air bases in Europe was built with the money of all nations of the former Yugoslavia and on a premise to defend all nations of the former federated country.

Unfortunately, as in any war which is in itself a notorious example of human stupidity, during the preplanned wars in the former Yugoslavia the base and people working in it turned against the people they purported to protect. Combat air crafts were ascending from the Zeljava airbase on the warpath against the people who built it, attacking citizens in both countries.

The town of Bihac and it's citizens were ruthlessly attacked from the mountain peak Gola Pljesivica, and in an agonizing and long isolation facing the great danger of experiencing a tragedy like the one in Srebrenica.

On 16 May, 1992, when it became clear that the paramilitary forces occupying the base will not be able to continue unhindered with the military operations, they began wide scale destruction of the base with 50 tons of explosives.
The airport was placed fully out of service after the mining of facilities and runways, but still situated in occupied territory until the liberation in the operation "Storm" in 1995.

There is nothing more important to our future than a lasting peace, not only in this region but around the world. Only under such conditions we have the opportunity to take the much-needed steps to shift our world onto a sustainable and resilient path - to start working for the people, our planet and prosperity for all!!

Important Safety Precautions

It is important to remember that the area of the air base was part of intense military operationsA great ecological damage was done with the destruction of the base. There is a risk of polychlorinated biphenyls, chemicals and radioactive americium-241 from hundreds of ionization smoke detectors. 

Some parts of the tunnel are in a very bad condition and dangerous for a stay.


  • do not enter the premises of the former the military base;
  • worry about their safety because you, as always and everywhere, are solely responsible for it;
  • stick to established trails, don't take shortcuts through the deserted area or private properties;
  • ask and follow the advice given by your hosts, or local guides;
  • take a thoughtful and reasonable approach to personal curiosity.

Zeljava in the 21st Century

After 20 years, the abandoned military complex has a chance to get a completely new role.

In 2019, the lead GWT2P partner, the Municipality of Plitvice Lakes, has won a national tender and got a historic opportunity to turn the base into a powerful engine for regional green growth and sustainable development.GWT2P - for people and the environment

GWT2P Vision

Self-sustaining development of the base that is now a key part of the large regional tourist destination with 2Parks as the leading attractions, can become a reality even during its present dehumanized phase through well-prepared, socioeconomically patient and inclusive work.

With its potential, and under jurisdiction of socially and morally responsible local administrations, Zeljava can easily give a very strong impetus to inclusive development that effectively serves and engages all local community members and to green growth that responsibly cares for natural resources, and therefore also for future generations.

Today, such large projects, especially in vulnerable developing economies, can attract the attention of the worst kind of investors that do not meet the ethical standards, but they rather unscrupulously foster their personal interests and profit. The answer to it is the joint, public and transparent work for which we created the conditions through a joint GWT2P development project that brings together all key local communities and public institutions of importance near the base, and by creating a regional adventure & eco destination that boasts two areas of protected nature, two national parks. With this foundation, the Zeljava Base itself will become a training centre for the development of socially responsible entrepreneurship and public-private partnerships whose goal is to preserve heritage, tradition and culture, protect the environment and support local communities and society.

Realization of the vision will be a great challenge and test, just like everything else that is transformative - it is now solely up to us to boldly step outside the outdated paradigms and divisions amongst people and put our full focus on building a new system of values and ethics that respects and supports local responsible, creative, and innovative entrepreneurs and citizens as the future key players in the development of base.

Future Zeljava as a dynamic business, cultural, and commercial zone for numerous domestic and foreign guests, dedicated to empower local and regional prosperity that benefits all, not a few.

Built in the 20th century for the purpose of war, now in 21st century Zeljava has a chance to get a meaningful role in peace - for the benefit of all people in surrounding local communities!
Explore Local represents a part of our natural and cultural heritage; for a fuller overview of the tangible and intangible heritage, see our Interactive Map under Experiences and Events and Activities Calendar with many suggestions for your itinerary.
If you can see through the illusion, you are part of the solution.

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