5. World Trade Center Water Tanks
With its sleek and modern build, you might never guess that the 1 World Trade Center actually contains 16 hidden water tanks! The tanks are strategically placed about every 20 floors, granting steady water pressure to all areas of the building. 3 WTC, shown in the photograph above, also has two hidden water tanks on the roof. Take a behind-the-scenes look at construction at this tallest building in New York City.