COBBLE HILL - The Brooklyn Historical Railway Association (BHRA) believes that a 180-year-old steam locomotive is preserved under a busy street in Cobble Hill.

A recent geophysical investigation report from under Atlantic Avenue shows that there is a large metallic and magnetic object underneath the roadway. Bob Diamond, of the BHRA, says it can only be a preserved locomotive in what he calls the "world's oldest subway."

He says the railway was used to help pull trains from the foot of Atlantic Avenue and Columbia Street all the way to Boston.

He is asking the Department of Transportation to dig underneath the road to remove the object.