Predjama Castle, the world's largest cave castle built into a 123-meter cliff near the village of Predjama in the municipality of Postojna, Slovenia, stands out with its natural beauty and history that fascinates its visitors.

The castle dates back to the 12th century. First built as a stone tower, the castle took its present form in the 14th century.

The castle was home to important families in various periods, but the most famous inhabitant was Erazem Predjamski, who lived in the 15th century.

Erazem Predjamski is known as a bandit chief and hero. Using Predjama Castle as a base, he fought against the Austrian Empire.

In 1483, the castle was besieged by the Austrian Empire's army, but Predjamski was able to circumvent the siege using the castle's cave system. Predjamski was eventually betrayed and killed by a traitor.

Highlights of the castle include: Built into a 123-meter-high cliff, listed in the Guinness Book of World Records as "the largest cave castle in the world", home of Erazem Predjamski, who lived in the 15th century, one of the most popular tourist attractions in Slovenia today

One of the most remarkable features of Predjama Castle is the cave system surrounding the castle. This cave system is more than 24 kilometers long and contains various natural formations.

The cave system played an important role in the defense of the fortress.

Predjama Castle is today one of the most popular tourist attractions in Slovenia. The castle welcomes thousands of visitors every year. There is a museum in the castle that tells about the life of Erazem Predjamski and the history of the castle.