- Who
- Predjama Castle
- Where
- Slovenia (Postojna)
- When
- 1570
At more than 35m (115ft) in height, Predjama Castle in Postojna, Slovenia, is the largest castle built in the entrance to a cave. Positioned halfway up a 123m-high cliff face, the castle dates back to at least the 13th century, and was rebuilt in a Renaissance style in 1570.
Pic: Alamy
