This imposing building in Michigan was supposed to be the central rail station, but it was repurposed before it was even completed. Building work started in 1913, and World War One broke out the following year. The military requisitioned the station, and used it for troop deployment.
When World War Two followed 25 years later, the station was once again put to work for the military, but there was no longer a purpose for it after the war ended. It's stood empty for decades, but may soon become a car factory.