Map of Chor-Bakr
The coordinates shown for all tentative sites were produced as a community effort. They are not official and may change on inscription.
I visited this tentative WHS in June 2017. It is in the outskirts of Bukhara and is practically the 'poorer' equivalent of the inscribed Shahi-Zinda Necropolis in Samarkand.
Nonetheless, it would be a very valid extension to Bukhara in my opinion (instead of a separate inscription). Again there is a plaque wrongly stating that this site is already inscribed as a UNESCO WHS.