A sweet one I watched yesterday, "Encounters at the End of the World,":
Filmmaker Werner Herzog takes you on a wild and woolly journey to the South Pole in this Oscar contender -- from the National Science Foundation's headquarters on Ross Island to some of Antarctica's most remote and dangerous terrain. With a keen eye for the wonders and sometimes hilarious peculiarities of this icy land's animal and human inhabitants, Herzog offers an astounding look at the world's most inhospitable landscape.
Discovery Channel's Everest: Beyond the Limit, seasons 1 and 2, is basically a reality show following a troop of climbers as they go up Everest. Pretty good stuff