Google Earth version 5.0 was released yesterday with some great new features which includes 3D view of Mars, ocean data (yes you now dive into the oceans).

I looked at incredible 3D view of Mariana Trench (deepest point in the oceans). Then I dived into North Atlantic to look at where Titanic sank. There it was, 3D view of Titanic lying on the Ocean floor. I created a video of this, here it is.