IMAX: Wonders of the World Collection Blu-ray

A three-volume documentary set exploring the natural world. 'Volcanoes of the Deep Sea' examines the active volcanoes deep beneath the North Atlantic Ocean.

The film follows Alvin, a mechanised deep-sea probe, as it journeys thousands of feet underwater to explore the constantly-erupting volcanic rift beneath the Azores between Europe and North America. 'Grand Canyon Adventure - River At Risk', deals with water conservation and is narrated by Robert Redford.

The film sees Robert F. Kennedy, Jr. and Wade Davis journey down the Colorado River into the depths of the Grand Canyon as they discuss this environmental issue.

The footage captures the vastness of the landscape, while explaining the need to conserve water.

Finally, 'Journey Into Amazing Caves' follows Dr. Hazel Barton and Nancy Aulenbach as they investigate caves in Greenland, the Grand Canyon and Mexico.

The explorers hope to find evidence about the history of the Earth and discover more about the microorganisms that live in extreme conditions.