First in the recent trend of glass walkways came the Grand Canyon Skywalk (2007):
[Photo from Grand Canyon National Park]
Then The Ledge at Willis Tower's Skydeck (2009):
[Photo from Skydeck website]
And this year came the Eiffel Tower:
[Photo from Tour Eiffel]
And the Tower Bridge:
[Photo from Tower Bridge Exhibition]
So what will be the next trendy, vertigo-inducing glass walkway attraction?
A logical site would be the Gateway Arch in St. Louis:
[Background image from Together We Roam]
But why not an Amazon warehouse?
[Background photo from Newsweek]
Or even the Oval Office?
[Background photo from White House Museum]
What would you want to see from above through a glass walkway?