One of the more popular tourist destinations in Chicago is the observation deck at the top of the tower-formerly-known-as-Sears. A month or so ago, the operators added a new feature, a set of three glass boxes protruding out from the building that let you look straight down. Having some free time last weekend, I decided to take a look.
The Chicago cityscape, looking northeast towards the lake.
(taken from the regular observation deck, not "the ledge", as it's called).
One of the ledge boxes:
It's a long way down:
Glass is a strong structural material, right?
Looking south:
-dms