IEEE International Joint Conference on Biometrics (IJCB 2023)

Trip to the Postojna Cave

Visit to Postojna Cave

On the first day of the conference (Monday afternoon, September 25, 2023), IJCB 2023 will have an (optional) social event intended to enable networking during a fun activity. To this end, we will organize a visit to the Postojna Cave, which is located around 50km outside of Ljubljana.

Social Event: Trip to the Postojna cave (optional – Not included in registration fee)
When: Monday afternoon, 25 September 2023
What to expect: Bus ride + train ride in the Cave + 3-5km walk
Important: It is chilly in the cave, bring long sleeves and a jacket (9°C/48°F all year long)
Cost: 35 USD

Information on the Postojna Cave

Official website:

Have a look at the YouTube video:

The Postojna Cave is a remarkable karst cave located in southwestern Slovenia, near the town of Postojna. It is one of the largest and most famous caves in Europe and attracts numerous visitors from around the world. The cave system stretches over 24 kilometers (15 miles) and encompasses a stunning network of tunnels, chambers, and galleries.

The Postojna Cave is renowned for its breathtaking beauty and unique geological formations. It was formed by the Pivka River, which carved out the limestone rocks over millions of years, creating a labyrinth of intricate passageways. The cave boasts a diverse array of stalactites, stalagmites, pillars, curtains, and other fascinating formations, which have been sculpted by the slow drip of mineral-rich water.

One of the standout features of the Postojna Cave is the massive underground hall known as the Concert Hall or Velika Dvorana. This colossal chamber can accommodate thousands of people and is often used for concerts and other special events due to its exceptional acoustics. Another notable attraction within the cave is the Brilliant Passage, adorned with countless shimmering stalactites and stalagmites.

Visitors can explore the cave system through a guided tour that takes them deep into its underground wonderland. The tour typically involves a combination of walking and riding a small electric train that navigates through the vast chambers. Along the way, knowledgeable guides provide insightful commentary about the cave’s geological significance, history, and the unique ecosystem that thrives within its dark recesses.

The Postojna Cave also hosts a subterranean animal kingdom, including the famous olm, also known as the “human fish.” These peculiar cave-dwelling amphibians are endemic to the region and can live for over a century. Visitors can observe these fascinating creatures in a dedicated aquarium within the cave complex.

The cave has a well-developed infrastructure to accommodate visitors, including a visitor center, gift shops, restaurants, and parking facilities. It is advisable to check the official website for up-to-date information on opening hours, ticket prices, and tour availability.

The Postojna Cave is a natural wonder that captivates visitors with its stunning geological formations, intriguing history, and unique underground ecosystem. It remains a must-visit destination for nature lovers and anyone seeking a truly unforgettable experience in Slovenia.