Postojna Cave
| Postojna Cave | |
|---|---|
| Location | Postojna, Slovenia |
| Coordinates | 45°46′57.6″N 14°12′13.2″E / 45.782667°N 14.203667°E |
| Depth | 115 m (377 ft) |
| Length | 24.34 km (15.12 mi) |
| Geology | limestone |
| Access | by train |
| Registry | Cave E-Cadastre |
| Cadastral code | SI00955 |
Postojna Cave (Slovene: Postojnska jama; German: Adelsberger Grotte; Italian: Grotte di Postumia) is a 24.34 km (15.12 mi) long karst cave system near Postojna, southwestern Slovenia. It is the second-longest cave system in the country (following the Migovec System) as well as one of its top tourism sites. The caves were created by the Pivka River.