This gravel road you takes you to the Diva Grabovceva statue. It commemorates the legend of a young virgin who refused to marry a nobleman, and was killed for his dishonoring.
The from the south is relatively easy gravel, but after the statue, it increase in difficulty to a medium due to the rutted, harpinned road down the mountain (or up, if you’re coming from the north).
Also, you will pass a couple of Nekroposi, that have interesting medieval history to it. I passed this on the 2017 trip which you can read about here. Also part of the TET.
The route as great if riding from, or in to, Mostar.