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One record that the world’s tallest building does not hold is that of fastest elevator, an honor that is held by the world’s second-tallest building, Shanghai Tower, whose elevators can get up to an astonishing 45.8 miles per hour. However, the average visitor is unlikely to experience this speed, as it requires a specially enhanced elevator car accompanied by a Mitsubishi technician.

One World Trade Center Was Built With Enough Concrete to Build a Sidewalk From New York City to Chicago

One World Trade Center Uses Enough Glass to Cover 20 Professional Football Fields

Chicagoans Tried to Change Willis Tower Back to Sears Tower

When insurance broker Willis Group Holdings changed the name of the second-tallest building in the Western Hemisphere from the iconic Sears Tower to the less evocative Willis Tower, locals balked. A petition to change the name back to “Sears” attracted 50,000 signatures and broad public support, but there was not much that could be done and the new name has remained.

The Highest Aboveground Bathroom Is in Willis Tower

Though only the second-tallest building in the United States, Willis Tower still holds the record for highest aboveground bathroom, with its Skydeck bathrooms at a staggering 1,353 feet above ground level (others reach greater elevations, such as Heavenly Mountain Resort in South Lake Tahoe, CA, where the restroom sits at 9,000 feet above sea level, though the building it’s in is partially ensconced in ground).

The Lobby of One World Trade Center Includes References to the Original Twin Towers
In particular, the white marble adorning the walls comes from the same quarry of the old towers.

It took Just 410 Days to Erect the Empire State Building

Impressive even by today’s standards, the tallest building in the world at the time took less than 14 months to erect—410 days to be exact—thanks to the assistance of 3,400 workers eager for a job during the nadir of the Great Depression.

The Burj Khalifa Holds More Records Than “World’s Tallest Building”

While Dubai’s Burj Khalifa holds the impressive record of World’s Tallest Building, it also holds five other records: the tallest freestanding structure in the world, the highest number of stories in the world, the highest occupied floor in the world, the highest outdoor observation deck in the world, and the tallest service elevator in the world.

The Fifth Tallest Building Has the Fastest Double-Decker Elevator

When the Lotte World Tower finished construction in South Korea last year—to become the fifth-tallest building in the world—one of its most impressive feats was the fact it had the world’s fastest double-decker elevator. Consisting of two attached cabins, one on top of the other, it can carry passengers to separate floors and carry twice the capacity of a standard elevator.

The Concrete in the Burj Khalifa Weighs as Much as 100,000 Elephants
That’s approximately half a million tons when it contains no people. Once it fills up, it weighs plenty more elephants.

The World’s Second-Tallest Building Is One of Its Greenest

While the world’s tallest buildings are known more for their excess than their sustainability, China’s Shanghai Tower has a number of green features that set it apart from other super high-rise buildings: It was designed with a 120-degree twist as the tower rises, which not only reduces wind loads but reduced the amount of construction material used by 25 percent; its rooftop holds 200 wind turbines, which generate about 10 percent of the building’s electricity; and it collects rainwater and recycles waste water.

Burj Khalifa’s Height Was Kept Secret

Just like the name change, the actual height of the Burj Khalifa was kept quiet until the building’s official opening day. The building’s Chicago-based architects, Skidmore, Owings & Merrill, commented that they had expected clever onlookers to measure the building’s shadow in order to get the info. And for more fun trivia, check out these 100 Facts That Will Make You Say “Wow!”

The Makkah Clock in Saudi Arabia Is the Largest Clock Face in the World

The world’s tallest clocktower requires a pretty big clock. The Makkah Clock, measuring 141 feet across, holds the record for largest clock face, and can be read from more than 10 miles away (the minute hand alone stretches 75 feet long). That makes it 35 times larger than the famous Big Ben.

Burj Khalifa Was Renamed as a Last-Minute Surprise

Originally named Burj Dubai at the building’s opening ceremony, it was renamed in a surprise move after Sheik Khalifa bin Zayed Al Nahyan, the president of the neighboring emirate Abu Dhabi (considering the billions that the emirate has poured into Dubai, it was perhaps the least they could do).

Yes, the Third-Tallest Building in the World Is a Clock Tower

In case you hadn’t figured this out by now. Though it require feats of cutting-edge engineering in its construction, the Abraj Al-Bait Towers—the world’s third-tallest building, in Mecca, Saudi Arabia—has a strikingly old-fashioned appearance, and houses an old-timey decorative clock at its top, known as the Makkah Clock.