Nui Cheo - a historical place located at the junction of two villages Hoi An and Phu Van (An Thanh commune) - has an altitude of over 780 meters above sea level, located at the junction of two rivers Kim Son and An Lao converging into Lai Giang stream and pouring down to Hoai Nhon. This relic is located near the provincial road axis No. 629 from Bong Son to An Lao and No. 630 from Cau Doi to Kim Son; at the same time, blocking the inter-commune road connecting Hoai An district town with the following communes: An Thanh, An Tin, An My, An Hao Dong, An Hao Tay.