Just in case anyone doesn't stop off at google on their way anywhere on the 'net, this is the little toy they're plugging today.
I'm not currently planning on sending any characters to Mars, for which this would be a nice, simple tool, but it's been such a mainstay of sf over the years - from H G Wells to War of the Worlds - that it has to be of passing interest to many sf fans.
And yes, it's a landscape already plundered by Christian sf too, right back to C S Lewis' Out of the Silent Planet, which may well have been the first instance of Christian science fiction - if anyone knows better, let me know!
A more contemporary version of Lewis' Malacandra - and therefore one more in accordance with current knowledge of Mars - is rendered by Stephen Lawhead in Dream Thief. This is one of my favourite Christian novels of any kind - worthy of a re-read and a proper review, but for now I will just say that Lawhead's sf books should be on any list of must-read Christian fiction.