Largest cave castle
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