Best things to do in Postojna

Postojna's Essential Karst Wonders

Postojna is defined by its dramatic karst topography, centered on the expansive Postojna Cave system and the Renaissance Predjama Castle built into a 123-meter limestone cliff. The region features significant subterranean networks like Planina Cave and Pivka Jama, alongside cultural landmarks such as the Haasberg Mansion ruins and a World War I museum. For biological insights, the Proteus Vivarium showcases unique cave-dwelling species, including the rare olm, within their naturalistic environment.

Postojna's Essential Karst Wonders — Map

Stuart Edwards. / CC-BY-SA-3.0

A

Postojna Cave

Postojna Cave is a 24.34 km long karst cave system near Postojna, southwestern Slovenia.

Luca Giarelli / CC BY-SA 3.0

B

Predjama Castle

Nested in a 123-meter-high rocky cliff, this is probably the most haunted castle in Slovenia – beautiful during the day and absolutely…

C

Planina Cave

Planina Cave, formerly also Little Castle Cave after Little Castle in the vicinity of its entrance, is one of the longest Slovenian active…

Sl-Ziga / CC BY-SA 3.0

D

Pivka Jama

A segment of the Postojna cave system accessed via a 65-meter deep collapse doline, featuring views of the underground Pivka River.

E

Museum

A private museum collection featuring artifacts, uniforms, and documents from the Isonzo Front of World War I.

Vid Pogacnik / CC BY-SA 4.0

F

Dvorec Haasberg

The ruins of a prominent Baroque mansion, which served as a major cultural hub before its destruction during World War II.

G

Dvorec Haasberg

A former 17th-century Baroque residence, now standing as a structural shell showcasing historical regional architecture.

H

Grajska štala

The preserved outbuildings and stables that once served the Haasberg estate.

I

Proteus Vivarium

This interesting exhibition teaches its visitors about the basics of speleobiology and features examples of cave fauna and flora.

Other Lists

Slovenian Karst Wonders Castles and Ruins Sacred Christian Sites Scenic Viewpoints and Peaks