Lock and Dam 21

Adams County

909 W. Lock & Dam Rd. | Quincy, IL

On the national register of historic places.

Built 1938.

Covers 1,075 acres along the mighty Mississippi, just south of Quincy.

Prime bald-eagle viewing + seasonal observation deck. Eagles have been wintering here since the opening of this impressive system in 1938. Hundreds of eagles per day have been spotted on-site during peak season. Drive to the boat launch for the best view.