Marco discovered a nice Flight Simulator from Google hidden within Google Earth. You need the latest version of Google Earth for it. I had Google Earth version 4.1.x which didn't work. You have to download the latest version 4.2. It provides You can activate it on different operating system as follows:
On Linux Press: Ctrl-Alt-a
On Windows Press: Ctrl-Alt-A
On Mac Press: Command/Open Appley Key + Option + A
Thanks Mike!

After you open for the first time you can subsequently open it from the Tools->Enter Flight Simulator menu option. You can use either a F16 or SR22, a high performance 4 seat propeller airplane. Both offer unique experience.
Flying over the Himalayas is captivating to say the least. The default airstrip is Kathmandu Runway 2.

BTW: I realized that if I continue along the ground then I can exit the runway and go into the fields and mountains without ever crashing! In other words you can also use the plane as a taxi and cruise along the mountains and plains. It is a pretty fun alternative experience, tumbling down the hills and all :)

I could operate it fine in a straight line on the air but need to work on changing direction.

The controls are very sensitive. You can get the full command reference here.

Have a blast!