THEORY
Ethics
Observations
 
PRACTICE
Abandoned Sites
Boats
Churches
Drains/Catacombs
Hotels/Hospitals
Transit Tunnels
Utility Tunnels
Various
 
RESOURCES
Exploration Timeline
Infilnews
Infilspeak Dictionary
Usufruct Blog
Worldwide Links
Kansas

Humboldt Brick Plant - An introduction to and an attractive photo gallery related to this 1897 factory.
K-State Tunnels - A playfully designed site with maps and other information about tunnels and other fun places at Kansas State University (currently down, hopefully temporarily).

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