See also: RU Screw
A smokestack in the Amtrak rail yard to the North of 30th Street Station in Philadelphia. The building that it is on used to be a power station for the Pennsylvania Railroad back in the day.
Today, the Drexel Shaft has no real use. It sits idle in the rail yard, and serves as both a University City landmark and as a constant reminder of the shafting that all students at Drexel University must endure on a regular basis.