I'm getting a Blu-ray player soon to play on my megatastic 50" Full HD Plasma tv. I love the sampler videos they have on display when you see the big TVs in the shop windows, of waterfalls and forests and the like.

What blu-rays do you suggest I get which feature some great nature scenes? Not bothered by animals, it's the landscape/natural world ones I like. Doesn't even have to be a documentary, could just be long unnarrated scenes.