Chicago is home to one of the tallest buildings in the world: the Willis Tower. So tall that on a windy day, the topmost floors can sway as much as three feet. But what keeps it from falling?

If you'd like to enjoy the sunset from the tower, plan on arriving 30 to 45 minutes before sunset to ensure you have enough time to get through the elevator line and up to the top. Willis Tower ...

A model of the CN Tower is put on a scale in an elevator in the CN Tower. As the elevator descends the weight of the model at first decreases and then returns to normal as the elevator continues down.

Landmark opened in 1973 with original tenant Sears Roebuck & Co. CHICAGO, Illinois (CNN) -- Sears Tower is history. As of Thursday, the iconic Chicago, Illinois, skyscraper is now named Willis Tower.

Undoubtedly, spring is New York City’s best season! After a long and cold winter, the city comes alive again with locals and ...

The number grew to 20 Thursday. That happened as maintenance crews repaired and reopened an elevator at the Freedom Tower ...

The Washington Monument, the Empire State Building, the Willis Tower—these buildings aren ... Though it is now closed—there’s an elevator for visitors—the monument is also renowned for ...

Owners of Willis Tower, Prudential Plaza and Aon Center received some unwelcome news from the county treasurer. But the owner of the Mart can't complain. The lease bucks the broader trend in ...

"I still don't call it Willis Tower," he says. He's not alone ... that utilize fuel-cell technologies and modernizing 104 elevators and 15 escalators to cut their energy-consumption costs by ...

What do travel bloggers, travel writers, and travel agents have in common? It’s their job to see and experience as many ...

Navigate backward to interact with the calendar and select a date. Press the question mark key to get the keyboard shortcuts for changing dates. Skydeck Chicago at the Willis Tower $25 $500+ ...

Chicago is home to one of the tallest buildings in the world: the Willis Tower. So tall that on a windy day, the topmost floors can sway as much as three feet. But what keeps it from falling?