Ludogorie
In ancient times , the Ludogorie was inhabited by the Thracian tribes of the Getae who left behind local architectural landmarks such as the Thracian Tomb of Sveshtari , a richly-decorated 3rd-century BC tomb that is a UNESCO World Heritage Site . 
<triplet> Thracian Tomb of Sveshtari <subj> World Heritage Site <obj> heritage designation <triplet> World Heritage Site <subj> UNESCO <obj> maintained by