The original H. LePaute Fresnel lens of this lighthouse is still in service (this is the only 2° lens still in use on the Great Lakes). This is a famous lighthouse, recognized as a National Historic Landmark. The keeper's house is Chicago's only maritime museum; one fog signal building serves as a visitor center while the other houses a nature center.

ARLHS Number: USA-359
Build: 1873
Construction: brick
Height: 36 m