The six fortresses – Sarmizegetusa Regia, Costeşti-Cetăţuie, Costeşti-Blidaru, Piatra Roşie, Bănița and Căpâlna – that formed the defensive system of Decebalus were designated as a UNESCO World Heritage Site in 1999. All the sites are in Hunedoara County, except for Căpâlna, which is in Alba County. Si chiar ruinele aşezări misterioase in apropierea Sarmizegetusei Regia, unde ar fi locuit o parte a aristocraţiei dacilor, denumite templele de la Feţele Albe
