Wider environment map (© Google Maps)

At the border between Bosnia and Herzegovina and Croatia one military facility is, due to war circumstances, abandoned and destroyed. According to analyses in this area, the ground and underground water flows are polluted, in particularly with PCB (polychlorinated biphenyl). Close to the border there are the city Bihac, the river Una (Bosnia and Herzegovina) and the Plitvice lakes (Croatia, EU), a famous tourist resort, which are a potential for the development of this area.
The underground part of the airbase is located in the base of the mountain Plješevica, which is well-known for its enormous variety of fauna and flora and endemic species. For years the airbase has been a place for human trafficking, a mine zone and a source of pollution for the natural environment, water streams and ground. It is a place that inspires imagination, because it is hidden and hardly accessible. Such facilities have been built with the newest and best construction materials and solutions, allowing them to be at the current state of technique in its time.
Historical development, analysis according to available literature, interviews and collected photographs represent a significant part in this thesis. Precise measurements are unknown and analyses of existing facilities do not exist. There is no reliable material published, that accurately describes the whole facility. The airbase Bihac was built from 1948 to 1978. The destruction of the underground facility (Objekt Klek) took place on the 16th of May, 1992.