Last week, news hit the blogs that Google Earth provides a flight simulator that allows a user to "fly" over mapped terrain of real places. Here's an excerpt from a post at Techcrunch:

Hidden inside Google Earth is a secret Flight Simulator that takes full advantage of Google's extensive satellite imagery. To access the hidden feature, open Google Earth and hit Command+Option+A (note it must be capital A) or Ctrl+Alt+A if you're using a Windows Machine. The Google Earth Flight Simulator comes with two aircraft options, a F16 Viper and the more manageable SR22 4 seater. Players have the option of commencing the game from their current location in Google Earth or can pick from a list of pre-determined runways.

Control instructions are here. Below are screen shots from the flight simulator.

This is the control panel where users choose the type of plane they will fly, the airport from which they will depart, and whether they will use a joystick to control the plane.

The user stalls (denoted by red type) over the Buenos Aires airpo

The user flies over the airport at Hamburg, German

The user flies over LAX in California