Over the last few decades, skyscrapers' heights - and thus their costs - have continued to climb. Business Insider rounded up the most expensive towers built in the last 20 years, defining a ...

Super-tall skyscrapers are being built in cities around the world where they might normally sink. But a process called deep-soil mixing allows builders to give skyscrapers a stronger base.

Built in 1938, the art deco Tower of Empire ... Once the exhibition ended, all but one of its buildings were demolished. The Palace of Art still stands to this day but is now used as a ...