mmmm there is an old worn down insane asylum in the woods near ellicott city (all i know)

did you check out the graveyard across from the towsontown center, on the hill? supposedly the pink flamingos lady/guy is buried there, although under real name.

also there is a small cemetery plot heading north on dulaney valley road after passing peerce's plantation on the right hand side near the tall wire crap thingies...

mmmm not sure of what else there is...i say hop in your car and drive around...

Here are a couple suggestions, off the top of my head...

I used to live across from the Our Lady The Redeemer Cemetary, at the corner of Belair Rd. and Moravia Rd. It's the largest cemetery that I know of in Baltimore (the road surrounding it seems at least a mile in circumfrence). There are plenty of old gravestones--some interred in the late 1800's, with plenty of interesting wear-and-tear.

As for old industrial buildings, near the entrance of the Robert E. Lee State Park (in Baltimore, just off of Falls Rd. about a half-mile north of Northern Parkway) and off to the left are some really decrepit buildings in the back lot of a lumber mill or something. I've always wondered what's in there, and for what the buildings were used before they were abandoned.

Hope this helps!