Four men had a terrifying few moments when the glass floor they were standing on 103 stories above Chicago in the Willis Tower observation deck appeared to develop cracks. The men were standing in one ...

The cracks formed after a group of visitors to the Skydeck at the Willis Tower stepped out on the Ledge, but Willis Tower officials said the glass itself did not crack, only the protective coating.

Observation decks like the one on top of the Willis Tower in Chicago and the Edge in New York City offer huge skyline views — and huge revenue. While Detroit doesn’t have a sky-high vantage point like ...

The $1.6 billion Renaissance Center redevelopment plan by two of Detroit’s most prominent companies would include a new Willis Tower-like observation deck — and the project would likely cost taxpayers ...

CHICAGO — The owners of the Aon Center, Chicago's third-tallest skyscraper, on Monday unveiled plans for an observatory atop the building, potentially setting up a heated competition for tourist ...

The Sears Tower was the world’s tallest building until 1996, when it was surpassed by the Petronas Twin Towers in Kuala Lumpur, Malaysia. With clear weather, four states are viewable up to 50 miles ...

Skydeck Chicago, the breathtaking observation deck on the 103rd floor of the Willis Tower, has launched its annual Valentine’s Day social media contest, “Love on The Ledge.” The special event gives ...