Sight Lines is an alternative tour map of Washington, D.C. These six routes travel through places that are practically invisible, unnoticed, underground, or hidden in plain sight. Some routes visit familiar historic sites or seemingly mundane parts of everyday life, but present them in new contexts. Other routes trace historic lines that had (or would have had) a great effect on residents but that are now obscured by contemporary flows of people, policy, and commerce. These self-guided tours use different modes of transportation through the District. Each is a distinct path, passing through layers of linked histories, lines of sight, ambient sound, and overlapping zones of land use.

Sight Lines maps are available at all DC Public Libraries.