The total territory of the national park is more than 20 000 ha and became a National Park in 1985. In the cave the average temperature is 10 °C, while relative humidity is 95-100%.
The Baradla Cave was formed some 200-230 million years ago in the Triassic Period, when this area was covered by water. Fossils of animals living in water were piled up forming limestone; in youngest rocks such fossils are still visible to the naked eye. The cave system of more than 25 km extend both beneath the surface of Hungary and Slovakia. (5.3 km long section is lying on the Slovakian side).
The Caves of the Aggtelek Karst and the Slovak Karst were declared part of the World Heritage by UNESCO in 1995.
Stamps:
Postal History
(Issued 02-05-2018)
Animals
(Issued 09-05-2005)
Castles in Hungary
(Issued 02-09-2019)
UNESCO - World Heritage
(Issued 18-03-2004)
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