15 Aug 1968.

Excerpt from Paul Anderson's survey report:

"...of course and none of this is evident in any of the orbital photographs. I dare not take the glider down any lower because of the wind shear.

Two thousand feet below me are the obvious remains of artificially created structures. These consist of partial walls and/or the foundations of rectangular buildings or edifices. My gut feeling is that these are the stone or mortar footings of buildings. I counted three or four such structures. I am more-or-less guessing here but my thought about the size of the largest building - if that's what it was - would equal the size of a small warehouse back on Earth or maybe 20,000 to 30,000 square feet.

Even more amazing is a series of five bridges (three are imaged, two are out of frame) spanning various parts of the gorge. I say 'bridges' because no other term or description comes to mind. I counted a total of five. These, too, cannot be natural objects. If my estimate of scale is true than these bridges are somewhat wider than a four-lane highway. I cannot make out any form of extra physical support or superstructure for them but they enter into the cliffsides through artificial ports reminiscent of masonry arches. For the life of me they simply look like long and thin (slightly irregular) rectangular rocks connecting one vertical cliff face to another. It's hard to tell what the drop-off is from bridge to gorge bottom but it looks to be in the hundreds of feet; perhaps much more as, in some places, I can barely see to the bottom.

At the same level of the 'foundations' are two rounded mounds which remind me of observatories or, perhaps, temples. They appear to consist of a darker material than that of the surrounding terrain.

It is obvious that it will be some time before we can get a team down into the gorge to have a look-see. It is at least a 1,000-foot sheer vertical drop into the gorge from the surface. I can see no other access into the area. "