The Notranjska region is a typical karst landscape with numerous karst phenomena.

Postojna Cave, Predjama Castle and Škocjan Caves boast the most wide-ranging souvenir offer.

Places around the intermittent Lake Cerknica, which has been the subject of explorations from as early as the 17th century, mostly offer mascots of witches or sorceresses, which are said to reside in Slivnica above Lake Cerknica.