Mile Markers: Linking Keys History is a collaborative digital library project of Monroe County Public Library, Florida International University, and the Historic Florida Keys Foundation. With a grant from the State Library of Florida and generous technical support from the Florida Center for Library Automation, over 900 photographic images on the cultural and economic history of the elongated, arcuate chain of low lying islands known as the Florida Keys are accessible here. This community photo album spans the years 1880 to present and depicts early industries such as sponging, shark fishing, turtle canning, and cigar manufacturing, as well as the unique architecture, sea, sun, fishing, and fun often associated with Keys vacations. Images of the building of Flagler's Florida East Coast Railway, construction of the Overseas Highway, presidential visits, the founding of the Conch Republic, the Mariel Boat Lift, and the aftermath of devastating hurricanes are also present.