If you've ever been anywhere in Europe, then you know that castles dot the landscape. However, it's hard to comprehend just how many castles there actually are without looking at this map. Each tiny red dot represents a castle, and they're literally everywhere. France is almost completely covered in red. There must be a dot for just about every city and town in the entire country by the looks of it.
There are even castles dotting what we are assuming are valleys throughout the Alps. And if you were wondering, the southwest dark spot in France is marshy and filled with woodlands.