The ruins of Thaj can be seen about 80 km west of Al-Jubail. It is a small village situated beside a dry lakebed. The archaeological excavations undertaken by the Danish Mission in 1967 and those carried out by the Saudi Deputy Ministry of Antiquities in 1985 revealed Thaj as a complete buried city surrounded by a strong wall.

Much of the wall is damaged; but one section of about 900 meters is in good condition. Several mounds; walls; housing foundations; pottery shards; glass; necklaces and earrings; decorative objects; clay pots and figurines have been recovered from the site. It is possible that Thaj was established during the Greek Seleucid period; possibly around early third-century BCE. Pictures From History