Nick
Some of the best photos in a group taken I have seen in almost ever.
The one looking in the background of the Aon Building...
I know this is about half way up but to be even taller than the Aon will be quite a feat for this building even though only the skinniest part will surpass it.
Your photos show how massive the Aon, previously BP, previously Standard Oil is and was. It was all by itself Just like the Sears and the JHC were in there day.
It was rather visionary to build all three of them so far apart from each other. At least the Sears had the rail network, the JHC had Michigan Ave address but the old Standard Oil building on or near streetervile at the time was just fill and full of train tracks far away from pretty much every way to get there.
Now things are blossoming around the Aon thanks to Millennium park and Maggie Daily park.
The Aon is one of my favorite buildings in Chicago.
https://www.flickr.com/photos/fakeis...eal/2417819124 Towering above the than tallest building at the time the Prudential building to the west. Not to hijack but it was built in the same manner as the twin towers in NYC.
https://openhousechicago.org/sites/site/aon-center/
Even this building is not taking the same risk as the Standard Oil did when they put down their roots.
This city is clearly amazing in so many ways.
Your helicopter ride made me also appreciate and re realize what Chicago built in the city years before most of SSP fourmers were even born yet.