Is if your on a planet and looking up in the sky..there a top of the world though......I would say not , as top only exists if your standing on a planet and looking up at the sky...:(
I know....how do they navigate bake to earth from Mar's say if the planets won't keep still...the calculations needed must be huge to aim for someting that could be 180 million miles away at launch..... Not sure I could work that out ,so I'm not going to Mar's... I'll just visit my dad instead....:)D
Well, you're no fun ... okay ... and above both of them is Earth's atmosphere. Earth's, showing that it is part of and belongs to the Earth ... like the hat you wear on your head is Nice's hat.
So ... the real answer to your question is Laguna Beach, Ca. :)