Predjamski Castle: Integrated in a Cave 0

Every castle in the world is unique in some way, no two are the same, but this one --even though it's rather small and humble compared to some-- is probably the only one in the world who is integrated in a cave, precisely the second largest cave system in Slovenia. Its name, Predjamski Grad, literally means "Castle in Front of the Cave."

The castle wasn't built in one go; first written records exist from 13th century, though the first part (left wing) was probably built in the first half of 12th century. Middle part was added in renaissance, and the right wing was build around 1570. Some things were added and changed later, but since 1990 renovation work is in progress, restoring it to the original 16th century look.