- Located at the Northeastern part of Agusan Valley sprawling across the Agusan River is Butuan City, known for its colorful history and culture. BUTUAN is a term believed to have originated from the sour fruit “Batuan”. Others opined, it came from a certain “Datu Buntuan”, a chieftain who once ruled Butuan. Scholars believed, it came from the word “But-an”, which literally means a person who has sound and discerning disposition. Whichever theories appear credible depends on the kind of people residing in Butuan, for whatever is said about them, Butuan continues to live on.