I've seen it, but those idiots at NGC managed to switch the last part of the documentary out for some cheesy movie... So I missed the last part =_=

The landscapes where quite impressive though. If you want a look at 'without water' maps, try and look for geological maps depicting the world, or parts thereoff about 12.000 years ago. During the last Ice-age, the water levels where a good 100 meters lower. Imagine walking from the UK to mainland Europe (actually, the UK WAS mainland Europe, even though both names didn't exist yet ).