Chicago Rail System - Urban archaeology on a primitive rail system under Chicago.
Chuck's Photo Spot - A collection of railfan and related photo galleries, featuring an album of abandoned building photos.
Chicago Tunnel Company Railroad - Stories and pictures about this largely disused tunnel system under Chicago.
IL-X - Journal-style site about visits to various abandoned buildings around Chicago.
South Illinois University at Carbonale - Steam tunnels, stories, memories and more.
Tunneling at UIC - Photo tour of the amazing tunnels and basements under the University of Illinois at Chicago.
Urban Exploration Illinois - Small site featuring abandoned buildings in Illinois.