Many impressive fan-made maps have come out, but George R.R. Martin is finally giving us some official detailed maps (drawn by Jonathan Roberts) in the upcoming book The Lands of Ice and Fire. Here are a few glimpses of some of the maps.
(Shatnerday, Star Trek)
Andrew DeGraff made these awesome maps of the original Star Wars trilogy, and now has done the same for the Indiana Jones movies. All of them. There were only three. Ever.
Kitkat Pecson made these beautiful maps that make Westeros and Essos look like much nicer places to live than they actually are.