Krizna Jama - A chain of twenty two underground lakes of crystal clear water near Grahovo. - http://www.burger.si/Jame/KriznaJama/KriznaJamaENG.html
kocjanske Jame - Features description and photos of the karst area situated in the municipality of Divaèa. Included in UNESCO's World Heritage List. - http://www.burger.si/Jame/SkocjanskeJame/ParkSkocjanskeJameENG.html
Postojna Cave - A 20km network of shafts, galleries and chambers boasting accessed via an electric train, Slovenia. - http://www.postojna-cave.com