6. The Pylons of the New Kosciuszko Bridge Are Partially Hollow

Soaring into the sky, the pylons of the new Kosciuszko Bridge measure 287 feet (nearly the height of the Statue of Liberty that stands at 305 feet tall). They’re made up of solid concrete up until the height of the bridge deck. From there, they turn into hollow tubes, where stairs provide access to cable anchorages and beacons required by the Federal Aviation Administration.