The 12 most expensive skyscrapers built in the last 20 years

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 skyscraper as a building that measures at least 500 feet tall. As you will see, not all skyscrapers feature a slender design.

Check them out below, in order from lowest to highest construction cost.