It looks like I made a mistake, I assumed it was Mars, Spirit only showed the visual, but clearly they are talking about Jupiter’s Moon Ganymede.
Notes on 3-10-15 Mars
“History in the making.. water!” Spirit’s Voice
I had a visual of the planet Mars.
It could be Venus, but unlikely because we are only exploring Mars right now.
I had a visual of a large deep canyon with deep caves, the cave had a small pool of water and the cave was damp.
If this is symbolic they are implying the water is underneath the surface of the planet.
The Facts on 3-12-15: A salty ocean is lurking beneath the surface of Jupiter’s largest moon, Ganymede, scientists using the Hubble Space Telescope have found. The ocean on Ganymede — which is buried under a thick crust of ice — could actually harbor more water than all of Earth’s surface water combined, according to NASA officials. Scientists think the ocean is about 60 miles (100 kilometers) thick, 10 times the depth of Earth’s oceans, NASA added. The new Hubble Space Telescope finding could also help scientists learn more about the plethora of potentially watery worlds that exist in the solar system and beyond. Quoted by: http://news.yahoo.com/jupiters-moon-ganymede-salty-ocean-more-water-earth-182011679.html;_ylt=A0SO80fX.AFVeQ0AE5xXNyoA;_ylu=X3oDMTEybzBwaGVvBGNvbG8DZ3ExBHBvcwMxBHZ0aWQDUTFNMDFfMQRzZWMDc2M-