Did you know the deepest parts of the ocean are still largely unexplored Courageous explorers risk their lives to go to these great ocean depths. Other explorers journey into deep volcanoes caves and mines. Who are they and why are they seeking a glimpse of the world deep below the earth's surface Turn the pages to find out.
Extreme explorers push the limits of exploration by scaling mountains trekking across polar ice diving into the ocean depths and more. Follow these brave explorers and learn what they uncover about some amazing places around the world.