This is major news. Google has today just posted new high resolution (10 meter) terrain for the western United States. This is very significant as it will make the area look even more realistic when viewed by Google Earth’s 3D capabilities. For example, the satellite and aerial photography better matches the terrain, so the imagery and 3D both look much better! Trust me, I’ve started visiting mountains I’ve been to before and they look great! Make sure you turn the “Options->Terrain Quality” to higher quality to see the terrain. You may want to turn it back to lower quality if it slows down your performance.
A few brief details on the new terrain and all the new imagery were posted by Google here.
Have started checking out the new terrain. Check out the Grand Canyon – it was already beautiful, but is even better with the higher quality terrain.
Also, check out the Grand Tetons in Wyoming – (just enter “JAC” for Jackson Hole airport, and look to the northwest). They look awesome with the terrain at high resolution.