
The following sights in Slovenia have been entered onto the UNESCO World Heritage list so far: the
Škocjan Caves, which represent part of the world's natural heritage and
the Idrija mercury mine, as well as the
prehistoric pile dwellings in the area of Ljubljansko barje as part of the world's cultural heritage.
The natural pearl of the Slovenian Karst underground has been on the UNESCO list since 1986. The several kilometre-long system of

water caves that has been formed by the
Reka river through million of years incorporates astonishing halls, including one of the largest in Europe.
Martel hall is 16 metres high, 120 metres wide and 300 metres long. The
natural bridges and windows and various stalagmite shapes are astonishing as well. Only a small portion of the caves is open for tourists; in 2011, a portion of the caves that had been closed since 1965, when the path was destroyed by a big flood, was re-opened.

The pile dwellings in the area of Ljubljansko barje are part of the attraction that includes 111 pile dwellings in six countries in the area of the Alps, built between 5000 and 500 B.C. For these dwellings, it is characteristic that the wood used for their construction was preserved in exceptionally good condition. The remains of the pile dwellings, constructed at the edge of Ljubljansko barje – this area used to be a lake – are now only visible in Slovenian
museums and deep underground. Besides various tools and even preserved clothes, archaeologists managed to find the
oldest wheel with an axle in the world in Ljubljansko barje. It is approximately 5200 years old.

The former mercury mine in Idrija entered the UNESCO list in 2012, together with the
Almadén mine in central Spain. In Idrija, mercury was dug out from 1490 to the mid 90's of the previous century. The
Antonij’s shaft of the once second largest mercury mine in the world now offers a picturesque depiction of the work and lives of numerous generations of Idrija miners and their families.
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Candidates for the UNESCO list

Besides the indicated sights, for years, Slovenia has been striving to get three other sights to meet the demands and measures of the candidacy procedure to be entered on the UNESCO list: the
Karst limestone plateau that should be acknowledged as a classic Karst area. Namely, this is an area where, for the first time, scientists have managed to explain some of the Karst phenomena, which have also been named after this area.
The iron works hills in Bohinj represent an area of Alpine pastures in
Triglav National Park where cattle grazes during the summer months at an altitude of approximately 1000 metres. The picturesque

area, which is one of the UNESCO candidates, is also known for its wooden shepherd cabins that are preserved only in this part of the Julian Alps. The area is also known for its typical old
hayracks, best preserved in the
Studor village.
The Partisan hospital Franja, located in a narrow gorge of Pasica near
Cerkno, used to take care of the wounded partisans during the Second World War; it is also in the process of being entered onto the list. The area of 16 shacks, where a museum is now located, was not discovered by the German occupiers despite several endeavours. The museum buildings were almost completely destroyed by the massive rainfalls in 2007, so, since 2010, the museum has again been open for visitors.
Biosphere reserves
UNESCO also speaks in favour of a balanced relationship between people and nature; moreover, it encourages countries all over the world to properly protect such areas. Slovenia has so far declared three biosphere reserves. The first includes the
Julian Alps, the second one the wider area of the Škocjan caves – called the
Karst biosphere reserve; since 2010, the Kozjansko Regional Park has also been declared the
Biosphere area of Kozjansko and Obsotelj.
Geoparks
The European network of areas with important geological heritage also belongs under the auspices of UNESCO. Two geoparks are included in this network from Slovenia.
The Idrija geopark located between the Alps and the Dinaric mountains is considered to be an area full of rock containing fossils. The cross-border
Karavanke geopark, which is also located between the Alps and the Dinaric mountains, incorporates the area between Peca and Košuta in Slovenia and Austria.