:THE INCREDIBLE HUMAN SERIES: click here to see more from the series

Humans have made it to the north pole, the south pole, to the moon, to the bottom of the sea, to the top of Mt. Everest — it would seem that there are not too many places left to be pioneered. The Grand Canyon, being one of the most well known monuments on the planet, would be the last place you might imagine unexplored canyons. Most of the Grand Canyon is associated with seeing the incredible views of its grandeur, but it is the narrow slot canyons that make up the intricate pathways of the water making its way into the giant canyon and river below. The final line in the trailer below suggests that John Wesley Powell first discovered the Grand Canyon 142 years ago, but there are still places there where no human has ever been. [Read more...]