I can no longer even imagine stepping out onto such an unguarded elevation above a chasm as described.
When much younger, I went to such heights as New York's Empire State Building observation deck, the St. Louis Gateway Arch, Chicago's Willis Tower (then the John Hancock), the Washington Monument and the towers of National Cathedral, and even crossed the Golden Gate Bridge on the back of a motorcycle, holding so tightly to a sailor named Ken that I may have left marks. And did all this without barely a hint of trepidation, if any at all. Now, if I even so much as see a photo looking down from such heights, my butt tightens and my stomach churns.
Age-related vertigo, perhaps? Anybody else experience such a change?