I like the storyline of this show,it attract me so much

People are voting emotionally.

Good movie, but best of all time? Hardly . . .

It's the kind of movie you'll want to see a second time with someone who hasn't seen it yet, to remember what it was like to watch it for the first time.

This apparently is an IMAX film but I saw it via Netflix streaming video. It looked Hi-Def and the sound is very good also.The two main "charecters" are real women scientists, explorers of caves, all kinds of caves. Each time they got to a new one the narration took the time to mention that they were looking of unknown microbes, "extremeophiles", that might provide some new leads to some new medicines to cure all sorts of things. I definitely got the impression that the film used funding for medical research and there was an obligation to continue mentioning it.Still, it is a fascinating film. Exploring caves in such places as the Grand canyon, ice caves in Greenland, and underwater caves on the Yucatan peninsula.Fine film, fine time diversion, for anyone who enjoys learning about new and interesting parts of our world.

I'm a big fan of IMAX, and this is the best I've seen. Stunning photography, the best shots, the movie is better than "Everest." The "making of" addition is also very compelling, and gives you a good understanding of how dedicated the people who made this movie are.

I first saw this IMAX film in Sydney on my trip down under. Not only was it amazing to see some of the most beautiful footage on a screen that is over 8 stories high, but the story was also very interesting to me. It had some incredible climbing scenes...112F in the Grand Canyon, 500' down into ice caves in Greenland, Bats in Georgia, and underwater cave diving in the Yucatan. It not only deals with the sport of caving, but one of the ladies in the film is a micro-biologists who is collecting rare extremophiles, microorganisms that live in extremely harsh environments, for scientific research. It was narrated by Liam Neeson with music by The Moody Blues. I bought it on DVD, knowing it would lose a lot visually going from the IMAX screen to my TV. I'm glad I did, because it has a "making of" documentary that was just as interesting as the IMAX movie, showing both the technical aspects of what went into the shoot as well as the personal side of those involved.

My daughter Maria and I were thrilled with so many scenes, especially:the kayaks plummeting down waterfalls while searching for new caves to explore;the scary heights of caves in the middle of cliffs only reachable by rappelling and/or crossing rivers by rope many, many feet high up;descending into ice caverns where you hear the icicles falling and the glacier groaning;and finally, the holding of our breath as they swam under water through body width openings in search of microorganisms, which was their main goal.The plane/helicopter rides were breathtaking also - seemingly going to crash you right into the side of a mountain.Their adventures in Iceland and North America, for the main sake of finding medical cures for the future, will never be forgotten.(And, if my daughter and wife aren't reading this, the ladies were sure cute, besides being brave, dedicated, athletic and intelligent.)