Photo taken on Dec. 10, 2019 shows ruins of a castle in the sea in the ancient city of Byblos, Lebanon. (Photo by Bilal Jawich/Xinhua)

Photo taken on Dec. 10, 2019 shows traditional residences in the ancient city of Byblos, Lebanon. (Photo by Bilal Jawich/Xinhua)

Photo taken on Dec. 10, 2019 shows a traditional residence in the ancient city of Byblos, Lebanon. (Photo by Bilal Jawich/Xinhua)

Photo taken on Dec. 10, 2019 shows the seaside scenery in the ancient city of Byblos, Lebanon. (Photo by Bilal Jawich/Xinhua)

Photo taken on Dec. 10, 2019 shows a port in the ancient city of Byblos, Lebanon. (Photo by Bilal Jawich/Xinhua)