British historian Dan Snow is attempting a massive historical challenge. The first exploration of the mighty Colorado River through the Grand Canyon. In this exciting geography documentary, he joins a team of historians and geologists to recreate John Wesley Powell’s 1869 journey through this natural wonder. The crew take on the area's rapids as they learn about the region's Native American past.

As British historian Dan Snow discovers, attempting to traverse the mighty Colorado River is no easy business. As this gripping geography documentary concludes, his team are faced with the river’s surging, perilous rapids, hard to navigate in any craft, but almost impossible in antique wooden boats. Can Dan and the team safely complete their dangerous enterprise?