San Francisco’s Millennium Tower wasn’t supposed to lean—but by 2016, it had already sunk 16 inches and tilted over a foot.

Thinking of Italy's Pisa instantly conjures the image of its leaning tower – the famous, centuries-old architectural marvel ...

The Leaning Tower of Pisa is a true marvel of engineering. It draws many visitors who want to learn about its secrets. Its design and lean helped it survive earthquakes, making it a symbol of ...

Ever stopped at a red light and noticed something odd about the poles holding up the traffic lights? Look closer next time—many of them appear to hover just above the concrete, anchored by visible ...

Oh, the Leaning Tower of Pisa — so touristy and yet so fun. Each day, hordes of visitors come to the small northwestern Tuscan town of Pisa to take pictures "propping up" its tower. Some do it ...

Built on the shifting sands of a former estuary, the Leaning Tower of Pisa probably began tilting not long after medieval laborers laid its first foundation stones. In the 800 years since ...

Have you ever wondered if the Leaning Tower of Pisa is a catastrophe waiting to happen? In this one-minute video, Ask Smithsonian host Eric Schulze explains how architects and engineers spent the ...

It opened during the Song Dynasty (959-961 AD), making it older than the Leaning Tower of Pisa, which was completed in the 14th Century. Though it is constructed of stone, its design echoes the ...

the Italian government closes the Leaning Tower of Pisa, sparking outrage by Pisan officials, who fear the loss of tourist revenue and the resulting impact on the local economy. The closure was ...