All right GMs, here's a map of the best available rendering of Antartica, sans ice sheet. You can thank the British Antarctica Survey and NASA for these wonderful videos and images. Click pics below to enlarge.
Oblique rendering by NASA’s Goddard Space Flight Center
Top view/enhanced color imaging maps by BAS
So you no longer have an excuse not to run that Marvel Savage Land or ruined-Earth-of-the-distant-future campaign you've been secretly working on.
Yeah, that one.