I thought I'd share this place here, Patapsco Female Institute.
It's private property but if you are willing you can rent it out. What left of the house is it's foundation and stone walls. It was gutted after neglect and what is left of it is used for a variety of functions.
If you want to research it, you'll find a lot of the historical information. It's mainly used as a rental property for weddings. It's a really interesting area with some cool public areas, too. There is an interesting main street as well.
I'm trying to get a group together and looking for cosplayers and photographers. There is a fee involved. I've got all the information on my DA.