Postojna Cave

"Postojna Cave, known as Postojnska jama in Slovenian, is one of the most famous karst cave systems in the world, located near the town of Postojna in southwestern Slovenia. Stretching over 24 kilometers (15 miles), it is the second-longest cave system in the country and features a mesmerizing array of underground passages, chambers, and galleries. This natural wonder is renowned for its stunning geological formations, including stalactites, stalagmites, columns, and curtains, formed over millions of years through the process of water erosion. The cave's vast network of passages is traversed by an underground river, which adds to its mystical allure. Visitors to Postojna Cave can explore a portion of the cave system on guided tours, which typically include a train ride through the illuminated passages followed by a walking tour of the most spectacular chambers. The cave's unique beauty and fascinating history make it a popular tourist destination and a must-see attraction in Slovenia."

"Postojna Cave, the only karst cave with a railway, has been in operation for over 140 years. The special tourist train will transport you through a labyrinth of karst tunnels, passages, and chambers. On a guided tour lasting an hour and a half, you will discover the key karst formations, such as the towering Skyscraper stalagmite, the striking Brilliant crystal, the ancient underground post office, and the fascinating olm, also known as the human fish."

"Postojna Cave in Slovenia is known for its stalagmites, stalactites, and speleothems. The cave is made up of four interconnected caves that were carved by the Pivka River over millions of years. There is a small rail system connecting these caves which provide a unique experience to tourists "