Through the startling reality captured by IMAX film technology, this spectacular National Geographic video takes you on a journey spanning 4,000 years of human history including the dramatic re-creation of the 1869 Powell Expedition. Experience the exhilaration of clinging to a fragile raft as it is swept through what are said to be the most treacherous rapids in the northern hemisphere…the thunderous whitewaters of the mighty Colorado River. Savor the quiet solimonoliths towering nearly a mile over the Canyon's floor in a tiny ultralight aircraft. You will experience Grand Canyon as never before in this captivating presentation.