In the Postojna geographical area, the Dinaric Alps meet the Mediterranean world, where the changing landscape varies from mountain ridges to large grassy areas mixed with huge cooland dark forests. The area is crossed by ravines and galleries, lakes and ephemeral rivers, cracks in the mountains; this is the Postojna aerea, in Slovenia.
During the spring, the place is filled with plants such a species of laurel, peonies, gladioli, white daffodils. In the geological past, all the plain area was a lake namedCerknica with an area of over 26 square kilometers. The oddity is that for six months the lake is full of water, and for the rest of the year one can find only a field of grass.
One of the first chronicles that mentions inPostojna was written by baron JanezValvasorVajkard. In the record dated back to 1689 he describes the lake as one of charm and beauty , at the same time characterizing it as ‘scary and full of mysteries’. The insideof the cavedescribed by Valvasor was bustling with worms, snakes and animals that inhabit a world in which there were underground monstrous statues in various forms, ghosts and other monsters. Other researchers have blamed the Baron for exaggerating distance of the labyrinthine route as 15 km inside the cave, though, when the caves discovered in 1818 by a native, he couldn’t submit more than 300 meters. Valvasor was the one who spread the fame of the cave on the entire world.
In the seventeenth century the interest in studying natural sciences has brought many researchers in this area. The famous English traveler Jeremiah Milles visited the black cave of Postojna in 1736. In 1750, the Habsburg Courtgranted a special attention for this area, this make to appearing the plans, scientific descriptions and even poetics. After 1818 it was proposed to install the lights and placed wooden chairs for the comfort of the cave visitors..
Postojna cave’s darkness does not prevent the development of life forms; research has revealed that over 150 animal species are living here, some are barely visible: leeches, Coleoptera, Diptera and a variety of fish.The greatest curiosity is a Human fish, Proteus anguineus, a tail amphibian that has atrophied eyes and breaths through their gills, but also possess fully developed lungs. This creature is unique to the Slovenian caves.
The caves of Postojna were formed 2 million years ago. The abundance of moisture is filtered through many layers of limestone, creating stalagmites and stalactites, huge stone columns, strange figures, and curtains of laced stone.