Vivarium Proteus
Mere 100 m from the entrance into the Postojna Cave visitors can enter the beautifully calcified Passage of New Signatures, where it is possible to see live specimens of the cave fauna. Close by, a speleo-biological laboratory can also be seen, where various measurements and observations of the underground world are conducted. The 220-meter long passage is part of the Postojna Cave system and runs 20-30 meters below the surface. On the north side it opens into the Old Cave, while the south side has been buried under debris. As it was easily accessible from the Old Cave, some prominent visitors in the 19th century were allowed to sign their names on the walls. In 1931, a speleobiological station was set up in the passage. In 2002, the sediments blocking the old entrance to the passage were removed and Vivarium Proteus was set up.
