thanks for such a warm welcome to both of you.
errm, there's only 1 larger cave "close" to me about 10km away, it's not the biggest and not the smallest, it's turistic. anyhow about the caves, there are more than 8500 registered caves in slovenia (only 20.237 sq km) and some are sure the nubmer will at least duble. we also have the first turistic cave Vilenica
which i visited about half year ago (if you wish i can send you some photos) the cave is pretty black due to use of torches in the past. what else can i say about them, huh each is special and in Postonjska jama
you can also see the local edemical specie the Proteus. and more for information, Kras (Karst) lies in Slovenia. i'll post some links of the caves homepages and pictures.
sorry im not familiar with expression spelunkerhttp://users.volja.net/zup-jama/ogled.htmhttp://www.park-skocjanske-jame.si/Burger/ParkSkocjanskeJameENG.html
now that i've searched the internet i've realized i just might have one of the biggest cave photo collections. so sad, no wonder people don't know about them.