Not specifically map-related, but very cool:

There is a glacier in Antarctica that seems to be weeping a river of blood. It’s one of the continent’s strangest features, and it’s located in one of the continent’s strangest places — the McMurdo Dry Valleys, a huge, ice-free zone and one of the world’s harshest deserts...
read it at http://www.mentalfloss.com/blogs/archives/45981