What is that?

While taking pictures of Poplar Hill in Aberdeen (along Route 7, across from Walmart), Maryland, we noticed the structure pictured above. I guess we could have walked over to it, but we don't like tresspassing, especially on land that may be owned by Amtrak, or worse, the DOD. And after all, that's what telephoto lenses are for. Still, I'd sure like to know more about it. We figure it's probably one of three things:

1. An old produce packing shed. The open structure and close proximity to the railroad favor this theory.

2. An old greenhouse.

3. An old barn that had its roof canabilised for other purposes.

Anybody know fer sure?

Photo by Kim Choate ©2006