I guess Nashville is most famous for country music, so I used a guitar for my zentangle "string".
I'm not really a huge fan of country music, per se, but I do love any kind of music with a guitar played well. I just love the sound of an acoustic guitar.
And I do love the Tennessee landscape. We are in a more rural area with rolling hills, old barns, and horses grazing in green pastures. (Well, not so green this summer since it is so hot and dry!) Here's a quick rough little sketch.