There's no denying that Google Earth has changed the way we view our planet's landscape. With a click of your mouse, you can "fly" around your own neighborhood, zooming in from space to street level. Curious about volcanoes? Dart over to the east coast of the Big Island of Hawaii and at times you can actually see the steam where lava enters the ocean. You can even explore the whitewater rapids on the Colorado River in the Grand Canyon.
But it was Google Earth's "Ocean" layer that recently caused quite a stir among 3D geeks.