If you're impressed by the capabilities of Google Earth, prepared to be amazed by a virtual tour of another planet.

NASA has just released a website that allows people to explore Mars without leaving home.

Mars Trek, an interactive map, lets users roam the red planet in 2D and 3D and zoom into specific areas, including its vast valleys and volcanoes.

You can also navigate to the landing sites of various rovers and robotic spacecrafts including Curiosity, Opportunity, Spirit and Pheonix.