Via SE, the Atlas of True Names, maps of the world and Europe that show the etymology of country, region, and city names. Some are fairly straightforward ("Land of Indians", "Virgin's Land", "Sea of Sand"), but there's a lot of fun stuff, too. Can you guess where "Land of the Chaste One" is? Or "Canal of Many Fish", or "Town of Respectables"?
But I think my favorite must be "I Don't Understand You!"
I wish the big map images on this page were enlargeable. Of course, then they'd be a lot less likely to sell the print versions. I have to admit, I'm kind of tempted.