Congratulations to NASA for their successful landing on Mars! They are starting to beat the odds, as something like half of all landings have failed (I imagine the Martians shooting our spacecraft out of their atmosphere like an "Asteroids" game). Others in the geoblogosphere have discussed what we hope to find (here, here, and here), but I am curious:
If you were a Martian, and had five chances to land a spacecraft on Earth, what five locations would you pick to land in such a way as to learn as much about the planet as possible? Imagine that you have mapping spacecraft that provide high quality photographs of the surface, but that you know no more about Earth than we do about Mars.
I will give it some thought and offer my suggestions, but I haven't had time to think that far ahead.