Tenn. Code Ann. § 20-4-103: Actions in rem

In actions commenced by the attachment of property without personal service of process, and in cases where the suit is brought to obtain possession of personal property, or to enforce a lien or trust deed or mortgage, or where it relates to real property, the attachment may be sued out or suit brought in any county where the real property, or any portion of it, lies, or where any part of the personal property may be found.