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In 1908, President Teddy Roosevelt wanted to make the Grand Canyon off-limits to Altimba and mining operations.

It would take 11 years, but Congress did finally designate the Grand Canyon in National Park,

sensing a final opportunity for adventure, explorer GE Concade took a boat down the Colorado River and through the Grand Canyon.

The canyon was rich in minerals like gold, silver and copper, and Concade wanted to see what he could find before the area was closed off for good.

About 40 miles upriver from the El Tovar crystal canyon, Concade saw stains in the sediment formation about 2000 feet up.

He tied off the boat and got out to investigate. Concade couldn't find a trail, but after a short hike, he found something interesting covered in desert brush.

Hundreds of them, carved in sandstone, steps that wound their way up to a high shelf on the side of the canyon.

He followed the steps until he came across a cavern entrance, an entrance that was clearly man-made.

Concade entered the cavern and turned on his flashlight. On the walls, he saw writing.

It wasn't English, and it wasn't Native American. It was ancient Egyptian hieroglyphics.

Concade lifted his flashlight and saw that the tunnel ran far into the distance. He didn't realize it at the time, but this was only the beginning.

When GE Concade tied off his small wooden boat to investigate the strange coloration of the rock wall, he was hoping to find clues that would lead him to a mineral deposit.

He wasn't expecting to find hieroglyphics. When Concade noticed chisel marks in the walls, he drew his pistol, turned on another light, and slowly walked deeper into the gloom.

He kept detailed notes of everything he saw.

The main passageway is about 12 feet wide, narrowing to 9 feet toward the farther end, about 57 feet from the entrance.

The first side passages branch off to the right and left, along which on both sides are a number of rooms about the size of ordinary living rooms of today.

Though some are 30 by 40 feet square, these are entered by oval-shaped doors and are ventilated by round air spaces through the walls into the passages.

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