^Big Bucks rule, if money can be made, it will be made...
In going public this year, New York's iconic Empire State Building disclosed that more than $92 million, or just over 40 percent of its annual revenue, is generated by its observation decks. The world's most visited spire, the Eiffel Tower, with more than 7 million tickets sold per year, likely brings in considerably more, Mr. Thomas says.
He estimates Willis Tower's annual revenue at more than $25 million in ticket sales alone, while Hancock likely brings in more than $10 million.
http://www.chicagobusiness.com/article/2...-new-way-to-look-down?r=2661H0047245H8W#
845 North State and Chestnut