The archaeological site of Anjar in the Bekaa Valley preserves the ruins of the ancient city of Gerrha built by the Umayyad dynasty Caliph Al-Malek in the 8th century. The city is almost perfectly square – 310m x 370m, surrounded by super thick 2m walls rising 7m high. The city plan was based on the Roman planning with two wide streets crossing it east-west and south-north exactly in the middle, dividing it into four equal quarters. The streets are lined with columns and ancient houses ruins. There is a Gran Palace with double arches and a couple smaller palaces. A tetrapylon stands in the very center of the city. The ground is littered with ornate ruin fragments of columns and palace walls. This is a UNESCO World Heritage Site.