By John Dodge

CHICAGO (CBS) — Once upon a time, not that long ago, people were amazed to stand in front of a window more the 1,000 feet above the earth and gaze across the sky–up to 60 miles or more on a clear day.

The views at places like the Sears Tower and John Hancock Center were glorious, and the experience was equally frightening and exhilarating.

Then, Mankind got bored. It wasn’t enough to look out; Man wanted to look DOWN!

In the 1990s, the CN Tower in Toronto built a glass floor on its observation deck.

Then came the Ledge at Willis (Sears) Tower–a glass box extending away from the building that allows visitors to step onto a clear floor and look down at the street below.

Now, 360 Chicago (formerly the John Hancock Observatory) will open its latest attraction on Saturday, called Tilt!

After forking over 5 bucks, eight brave souls at a time can step up to a glass window on the south side of the 94th floor.

They are then slowly tilted outward at a thirty degree angle over the Chicago skyline.

If that sounds like fun, then you need to check out what those crazy Canadians are doing up there in Toronto.

The Edge Walk at the CN Tower in Toronto. (Credit: CN Tower)

The Edge Walk at the CN Tower in Toronto. (Credit: CN Tower)