CNET slide show:
Google Earth 4 beta
This splendid mapping and sightseeing tool puts the whole world in your hands, then hands over the tools to let you build your own world.
Slide 3 of 12
You can use the tilt controls above the navigation wheel to control the angle of a view of the horizon. To emphasize the elevation, you can tilt the perspective to achieve a sideways look at a mountaintop or a skyscraper. Here, you can get a sense of the terrain and attractions around Yosemite National Park.