Although Germany has the largest number of castles and Wales has the most castles per square mile, lots of European countries have some amazing castles. Each one has its own unique, interesting history and secrets to tell.

In 2026, Germany is widely recognized as the country with the most castles, with estimates ranging from 20,000 to 25,000 historic fortifications, ruins, and stately homes. While France claims high numbers (often cited as 45,000), this figure is frequently debated because the French term "Château" can refer to a grand country manor as well as a defensive fortress. Germany’s castles, or Burgs, were built in staggering numbers during the Middle Ages due to the fragmented nature of the Holy Roman Empire, where every local lord required a fortified seat. Wales also claims a title here, boasting the highest number of castles per square mile in the world, featuring over 600 structures in a relatively small area. For travelers in 2026, Germany’s "Romantic Road" and the Middle Rhine Valley remain the premier destinations for seeing the highest density of well-preserved medieval architecture and fairy-tale palaces like Neuschwanstein.