Subglacial Lakes

Check this image and description out.

From NASA's Earth Observatory:
"To the untrained eye, Antarctica may look like a giant piece of solid ice that rarely changes, but scientists studying the continent have long known better. The icy surface is dynamic, with glaciers and “streams” of ice flowing toward the ocean. Underneath the ice, the picture is equally complex. Thick masses of ice may appear to rest on solid land, but they actually float on water, with scattered islands bumping into their underbellies. Well inland from these ice shelves, the terrain includes mountain ranges and watery basins buried in ice....."

Full story at:
http://earthobservatory.nasa.gov/Newsroom/NewImages/images.php3?img_id=17626