I'm listening to a very cool piece by this title, thought about Olympus Mons.

Check it out, maybe there's a vid to paste this onto?

http://www.youtube.com/watch?v=wrfuDCry3yQ

Cool indeed. Having seen the view from the summit of the earthly Mount Olympus in Greece, I can relate to that...

Speaking of views, would it be possible to see a rainbow on Mars, through the ice clouds?

I found this, which is claimed to be from Opportunity (Sol 101).
http://farm4.static.flickr.com/3001/250532...97737b816_m.jpg
Similar image here:
http://www.lyle.org/~markoff/Opportunity_p..._0101_0120.html

I read somewhere that optical effects around the sun - solar haloes, "sun dogs", circumzenithal arcs, etc - will be visible on Mars. I think it was a SKY & TEL article, and it was referred to back in the Phoenix days when we were all hoping for colour views of the sunset, etc...