An idea for the creator of this great little timewaster iPhone app. :
Have a look at what DegreeConfluenceProject creators have done (http://confluence.org/) or the people of the Phoons (http://phoons.com/) and make a category of famous places sliced ?
My latest capture would look nice there : Stonehenge (http://adumbration.adum.com/slicer/map.php?user=356)
Say aye if you would add your vote to this idea.