The Marib Dam is a modern dam blocking the wadi or valley of Adhanah in the Balaq Hills, located in the Ma'rib Governorate in Yemen. The current dam was built in the 1980s and is close to the ruins of the ancient dam, first built in the 8th century BC. It was one of the engineering wonders of the ancient world and a central part of the Sabaean and Himyarite kingdoms around Ma'rib.

Yemen, officially the Republic of Yemen, is a sovereign state in West Asia. Located in the southern Arabian Peninsula, it borders Saudi Arabia to the north, Oman to the northeast, and the Indian Ocean to the south, sharing maritime borders with Eritrea, Djibouti and Somalia across the Horn of Africa. Covering roughly 528,000 square kilometres, with a coastline of approximately 2,000 kilometres, Yemen is the second largest country on the Arabian Peninsula. Sanaa is its constitutional capital and largest city. Yemen's estimated population is 34.7 million, comprised mostly of Arab Muslims. It is a member of the Arab League, the United Nations, the Non-Aligned Movement and the Organisation of Islamic Cooperation.