Cumberland River Nashville Tennessee
One of the most fascinating subjects I have ever come across. The structure is massive, accordingly so is this image (4736x3320 px). This object can be found on the south side of the Shelby Street Bridge over the Cumberland River in Nashville. In the background is the Korean War Veterans Memorial Bridge.
Uncertain I am about the exact nature of this. Apparently it is the structure for a crane that would probably load stuff onto barges on the river. Train tracks are directly behind it. I'm not sure how long it has been abandoned. -Exothermic