Eastern archeological site, Tipaza Prefecture, Algeria.
From Unesco World Heritage website https://whc.unesco.org/en/list/193/ :
On the shores of the Mediterranean, Tipasa was an ancient Punic trading-post conquered by Rome and turned into a strategic base for the conquest of the kingdoms of Mauritania. It comprises a unique group of Phoenician, Roman, palaeochristian and Byzantine ruins alongside indigenous monuments such as the Kbor er Roumia, the great royal mausoleum of Mauretania.