4Rhodes Castle (Palace of the Grand Master of the Knights)

One of Greeceā€™s most famous and awe-inspiring castles, the Palace of the Grand Master of the Knights in Rhodes is a spectacular medieval fortress.

Originally built in the 7th century and later expanded by the Knights of St. John in the 14th century, the castle features massive stone towers, intricate mosaics, and a rich history of Crusader battles. It is now a UNESCO World Heritage Site and a must-visit destination on the island of Rhodes.