Skaftafell is a extremely popular location for ice caving enthusiasts. Skaftafell National Park is a gorgeous, lush mountain region located on the southern edge of the Vatnajökull glacier, situated between Kirkjubæjarklaustur and Höfn in the south of Iceland.
Postojna Cave is a 24,340 m long karst cave system near Postojna, southwestern Slovenia. It is the second-longest cave system in the country as well as one of its top tourism sites. The caves were created by the Pivka River.