One of nature's most spectacular and perilous wonders, volcanoes -- with a danger radius of 20 miles, temperatures that can exceed 2,000 degrees and lava traveling up to 150 miles per hour -- are capable of cataclysmically consuming entire forests or towns and triggering tsunamis, flash floods, earthquakes, mudflows and rock falls. Of hundreds of active volcanoes in the world, over three-quarters are part of the explosive Ring of Fire, a 30,000-mile region encircling the Pacific Ocean. Explore this fiery and earthquake-prone region to learn the causes of eruptions and how 500 million people have adapted to --even embraced -- living in their volatile shadow ... from miners in Chile eking out a perilous living from the sulphur produced in the heart of active volcanoes to macaques monkeys luxuriating in naturally formed hot mineral springs in Japan's remote "Hell Valley." Narrated by Robert Foxworth (Transformers, Syriana) and featuring breathtaking cinematography, including extensive aerial photography, from the U.S., Japan, Chile, Indonesia and the Philippines, where -- at great personal risk -- the world's top geologists, anthropologists, computer animators and filmmakers spent over seven years documenting this unpredictable and awe-inspiring phenomenon.