What formed the enormous Victoria Falls? How did the Grand Canyon get where it is? What is the Great Barrier Reef? Spencer Christian, one of America's favorite television personalities, answers these and many other questions in this enthralling book about our world's most incredible natural wonders. He takes kids on a thrilling adventure from the top of Mount Everest to the bottom of the Carlsbad Canyons, teaching them how each astonishing place was formed.