Tours
The classic hop-on hop-off loop. Not cool. Useful on day one if nobody wants to drive.
Official site Downtown Nashville
Several companies run these. Confirm which brand Martin prefers; the current site lists Old Town Trolley as a common option.
Record yourself in a real-looking session. Touristy, fun for a bachelor party that is tired of shots.
Pink bus, Big Hair, and jokes you cannot unhear. A group activity, not a history lecture.
The Mother Church of Country Music — a former tabernacle with pews, stained glass, and a calendar that is not only country.