First off, when you click the URL above it takes you to the online Google Mars map, but you will need to hit the button in the upper left corner that says infrared.
I found a pond in the center of a crater on Mars using google earth map. The pond clearly looks like a liquid and and is even on all sides of it. Its not a tunnel or a cave, but an area covered in a liquid. It could be water, but may be some there liquid entirely. I know its not a tunnel entrance because if I hit the button in the upper left that says Elevation, you can see that its depth is small, oval and similar to that of a pond. I just wanted to share this with you. Water on Mars, we all know it exists, but if this is water, its a lot. Over 3km across!
Scott C. Waring – Taiwan
