Promising "extreme adventures in extreme places," this fantastic travel series from the Discovery Channel transports you to some of Earth's most amazing natural wonders. Through stunning computer-generated imagery, you'll learn about how time and nature collaborated to create a variety of jaw-dropping destinations. All six episodes of the series─including "Grand Canyon," "Earth Story," "Great Barrier Reef," "Sahara Desert," "Hawaii," and "Alaska"─have been collected in a two-disc set. 4 hrs. total. Widescreen (Enhanced); Soundtrack: English Dolby Digital stereo.