Nowhere is the cycle of nature more dramatic than at Alaska's Disappearing Lake.

In heart of Alaska, surrounded by mountains, a lake spring as if by magic. Winter snows have blanketed the lake bed and the surrounding land in Denali National Park for months. As the snow melts, the water slowly rises up the surrounding banks until the lake is full With it, a complete ecosystem is reborn.

Birds and beavers, moose and caribou, hares and wolves, the animals drawn to the lake. Many of nature's are replayed each year in and around the lake. Some even begin their fives here.

Then, as the days grow warmer, the lake begins to disappear, as slowly and steadily as it appeared, becoming a meadow again. Some animals move on when the lake no longer serves their needs; others find the meadow to their liking. But they'll all return next year, just as the lake will.