On Earth, you can land at any of over 33,000 airports, as well as test your mettle on aircraft carriers, helipads on building tops, frigates that pitch and roll in the waves, and oil rigs. We also have MARS scenery! (thanks to the Mars Orbiting Laser Altimeter, which mapped that planet's elevation). X-Plane comes with 35 aircraft spanning the aviation industry (and history), and several thousand more are freely downloadable from the internet. It comes with subsonic and supersonic flight dynamics, sporting aircraft from the Bell 206 Jet-Ranger helicopter and Cessna 172 light plane to the supersonic SR-71 and Space Shuttle.
X-Plane is one of the world's most comprehensive, powerful flight simulators, and has the most realistic flight model available for personal computers.