Google - Mars Explorer
This map of Mars, published by Percival Lowell in 1895, was the result of many years spent carefully studying the Red Planet through his telescope. Now you can do the same through your web browser. In collaboration with NASA researchers at Arizona State University, we've created some of the most detailed scientific maps of Mars ever made.
If you have half as much fun exploring them as we did making them, you're in for a great time.