Question: What country houses a capital that is one of the largest cities in the Saraha and is also home to The World Heritage Site?
Sentence (from "Banc d'Arguin National Park"): The Banc d'Arguin National Park (Arabic: حوض أركين‎ ‎ ) of Bay of Arguin lies in Western Africa on the west coast of Mauritania between Nouakchott and Nouadhibou.
Relevant evidence: Yes