Castles are a staple of world history, particularly European history, as several of them still stand today. … All of these castles have received extensive repair work throughout the centuries and most of them are open to the public today as tourist attractions.

What is the oldest castle still standing?

The Citadel of Aleppo is the oldest castle in the world, with some parts of the structure dating back to 3000 BC. Built in 1070 AD, Windsor Castle is the oldest castle that is still actively used today. Prague Castle is the largest castle in the world at 70,000 square meters.

Which castle is built into this cave?

The only thing more fairytale-like than a castle is a castle perched on a 400-meter cliff that’s built around the entrance of a natural cave. Oh, and did we mention there’s a network of secret passageways? The Predjama Castle in Slovenia has all that and more — and it’s open to the public year-round.