Predjama Castle in Slovenia is a spectacular fortress embedded in a limestone landscape. JURE MAKOVEC/AFP via Getty Images The way in: The modern entrance to the castle is via a drawbridge.

Behind the lens: Predjama Castle, Slovenia – there has been a castle on this site for almost 1,000 years. During the latter part of the 15th century, the owner withstood an enemy siege for over ...

Some castles were built to keep armies out, others to show off wealth. But in a remote corner of Slovenia stands a fortress that merged ambition with nature's own architecture. Here goes its story.

Predjama Castle in Slovenia's Inner Carniola region is a rather unique structure in the world of castles, having been built within the mouth of a cave. The castle, which was constructed in 1274 on ...

Predjama Castle in Slovenia's Inner Carniola region is a rather unique structure in the world of castles, having been built within the mouth of a cave. The castle, which was constructed in 1274 on ...

A combination ticket for €32 includes a 10-minute train ride underground, 90-minute guided walk through the cave, and entrance to Predjama Castle about 9 km away.

Here, you'll find shrieking ghosts, immortal blood stains, and the literal gateway to hell. 1. Predjama Castle, Slovenia (Getty) ...