As a domain expert in geography and structural engineering, I can provide an informed answer to your question. The title of the "tallest thing in the world" can be a bit ambiguous, as it depends on whether you're referring to natural formations or man-made structures.

For natural formations, the tallest mountain is often considered the tallest thing. Mount Everest, part of the Himalayas in Asia, is the highest mountain on Earth with a peak at 8,848.86 meters (29,031.7 feet) above sea level.

When it comes to man-made structures, the title of the tallest can change over time as new buildings and towers are constructed. As of my last update, the Burj Khalifa in Dubai, United Arab Emirates, is the tallest man-made structure, standing at 828 meters (2,717 feet).

So, depending on the context, the "tallest thing in the world" could either be Mount Everest or the Burj Khalifa.

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Mount Everest is called the world's highest mountain because it has the "highest elevation above sea level." We could also say that it has the "highest altitude." The peak of Mount Everest is 8,850 meters (29,035 feet) above sea level. No other mountain on Earth has a higher altitude.read more >>