» 28 Days Later    UK urban exploration forum.    http://www.28dayslater.co.uk/

» City Skip    A group for those interested in urban exploration, urban planning, architecture or cities in general.    http://groups.myspace.com/cityskip

» Live Journal: Abandoned Places    A community dedicated entirely for those of us fascinated with everything abandoned.    http://community.livejournal.com/abandonedplaces/

» Live Journal: Urban Decay    A community for people who find beauty in decay. Share pictures of abandoned buildings, historical places, things that are falling apart.    http://community.livejournal.com/urban_decay/

» MySpace: Abandoned Muse    Dedicated to exploring the art of urban decay.    http://groups.myspace.com/abandonedmuse

» MySpace: Ghost Geeks    Level-headed, serious ghost geekettes with limited equipment but eager minds, sensitive natures. Urban exploration, everything from sunken hotels to ghost towns.    http://groups.myspace.com/ggeeks

» MySpace: Urban Explorers International    For the discussion of urban exploration, architecture, psychogeography, urbanism, city planning, the psychology of place, discovery of places you're not supposed to go.    http://groups.myspace.com/uei

» MySpace: Urbanus Rimor    Group for sharing information, trading photos and generally getting info about disused and derelict buildings that you've either explored and are interested in exploring.    http://groups.myspace.com/urbanusrimor

» SU: Urban Explorers    StumbleUpon group for everybody who enjoys abandoned and derelict places, worldwide. Includes restoration and preservation sites. Share photos, impressions, and memories.    http://urban-explorers.group.stumbleupon.com/

» Spooky Stuff    A forum for sharing underground exploration stories.    http://p220.ezboard.com/bspookystuff

» Tribe: Abandoned Places    Anyone interested in abandoned places and urban exploration. Share your pictures, find other expolorers.    http://tribes.tribe.net/abandonedplaces

» Urban Exploration Front    A community for sharing links, sources and photographs.    http://community.livejournal.com/explorer/

» Yahoo Groups: Modern Ruins    A forum for photographers of modern ruins. Discussion and shared photographs.    http://groups.yahoo.com/group/modernruins-photo/

» Yahoo Groups: Urban Exploration    Discussing adventure in places you're not supposed to be.    http://groups.yahoo.com/group/Urban_Exploration/