Outside of the tavern a historical marker was erected in 1973 when it was added to the National Register of Historical Places. It reads: "Historic Tavern: Unionville Tavern, once a covered wagon stop and a station on the underground railway for runaway slaves, is still doing business on the same spot, at the intersection of Rt. 84 and County Line Rd. The building has stood since 1805 and bears a heritage plaque from the Lake County Historical Society." While the tavern may not be doing business anymore, it remains a cultural landmark for the people of Unionville.
