Lower Mesopotamia

• — the major city of the south, a large port town on the Shatt-al-Arab River just northwest of the Persian Gulf.

The entirety of Karbala Province is located here, and is notable as the place of Martyr Imam Husain, where he fought war with Yazid, then Emperor or caliph of muslims, who had support of sunnis, and was thus proclaimed Caliph. The place has the tomb Imam as well as his armies Commander-in-chief and brother Abbas Allambardar. The Imam Husain's army had 96 warriors including women's and children were called Ahlebait. The total deaths in Ahlebait was 72. The place has the tomb of all the martyrs. It is considered a sacred place for Shi'a Muslims.

Lower Mesopotamia is home to a mixed world heritage site, The Ahwar of Southern Iraq: Refuge of Biodiversity and the Relict Landscape of the Mesopotamian Cities, comprising four marshland areas and three Sumerian archaeological sites:

• Huwaizah Marshes
• Central Marshes
• East Hammar Marshes
• West Hammar Marshes
• Uruk Archaeological City
• Ur Archaeological City
• Tell Eridu Archaeological Site