If you haven’t wasted enough time on Google Earth yet well you may be about to. It seems that there is a secret Flight Simulator embedded within the program that takes full advantage of Google’s extensive satellite imagery.
Here is the info provided by LifeHacker:
How to find it: Launch the latest version 4.2 of Google Earth (free download) and hit Ctrl+Alt+A (Mac users: Cmd+Opt+A.)
What you get: A full-on flight simulator that lets you choose an airport, plane type, and lets you fly inside Google Earth. It is fun but it’s not easy; here’s more on how to navigate in flight in Google Earth.
