We are fascinated by its beauty, and its ability to refresh both us and our landscapes. But water can be one of the most powerful forces in nature - it brings the gift of life but it can cause death and great destruction. See how only six inches of rushing water is strong enough to move a car. Be there as a tsunami surges onto shore and reveals why it is one of nature's deadliest powers. Discover how in only twenty-four hours a giant flood reshaped the North American landscape. And marvel at how water created fabulous, giant crystals in a cave so huge a jumbo jet could fly through it.