It's in a tiny, tiny, town (TINY!) called Rosine. The Barn Jamboree was a hall where Monroe played on many occasions.
On the way back to the highway, we were listening to Conor Oberst's song "Sausalito," which contains a line about "highway shrines where pilgrims disappear." Couldn't help but think about this humble tribute to old Bill Monroe . . . and his impact on virtually every kind of music that followed.