Uploaded February 2026 | Updated September 2026, 4 hours ago

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From ancient lakes and vast rivers to frozen polar ice and tropical rainforests, this documentary explores how water shapes ecosystems, drives migration, and sustains life in even the harshest environments. Subscribe to Our World: bit.ly/3xnPuGL

This film was first broadcast: 2001

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Explore Our World and watch some of the most successful nature documentary series about the environment and the wonders and dangers nature has to offer. We will be posting some of the longest-running and most successful nature documentary series, revealing the trials and tribulations of life on Earth and often for the first time, the secrets of the natural world in all its wonder.

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