The Chicago Harbor Lighthouse is a historic and picturesque landmark best viewed externally, primarily from architectural boat tours on Lake Michigan or from vantage points along the shoreline and Navy Pier. While direct public access inside the lighthouse is generally not available, many guided boat tours, costing approximately $40-$60 and lasting 1-2 hours (as part of a larger tour), offer excellent close-up views, usually operating seasonally from May to October. Viewing from land is free and can be done solo year-round, though winter weather can be challenging; the visit duration is brief when viewed from a distance. It's highly recommended for photography enthusiasts and those interested in Chicago's maritime history, serving as a beautiful backdrop within a broader Chicago sightseeing experience.