Explore the heights of America's tallest skyscrapers in this comprehensive comparison video. We rank the tallest buildings ...

From a tower with the largest clock on Earth to a mind-bogglingly tall building that holds 7 world records, this video presents a 3D comparison of the tallest skyscrapers on the planet. It features ...

On Saturday night, Alex Honnold, considered the greatest free solo climber in history, attempted to scale a structure called ...

Looking back through time, the world’s tallest man-made structure was the Great Pyramid of Giza in Egypt. It held that position over 3,800 years, until the Lincoln Cathedral was built in 1311.