Watch Grand Canyon: The Hidden Secrets (1984) : Full Movie Online Free In this spectacular exploration you'll take a journey through the 4,000-year history of mankind's relationship with the Grand Canyon. Discover the earliest inhabitants of the Canyon whose lives are still shrouded in mystery. Travel with Spanish explorers as they become the first Europeans to uncover the Canyon's awesome beauty. Ride along in the re-enactment of US explorer John Wesley Powell's expedition down the raging Colorado River, when nine crew members risk their lives to become the first to travel the length of the Canyon by boat. Grand Canyon: The Hidden Secrets will take you into the rarely visited side canyons filled with hidden waterfalls and unusual wildlife. Experience the Canyon as never before: soaring over the rim and flying through some of the most inspiring scenery on Earth.