On a budget, weigh it — Willis Tower Skydeck isn't cheap for what it is.
$33–43 adult
The view is the highest in the city and The Ledge — stepping onto a glass floor 1,300 feet up — delivers a real jolt. The catch is the experience around it: long queues, a corralled museum-style approach, and a price that stings if the sky is hazy, so check visibility before you commit.