Wiki Education Foundation-supported course assignment

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  This article is or was the subject of a Wiki Education Foundation-supported course assignment. Further details are available on the course page. Student editor(s): Seanmarcolini. Peer reviewers: Datamna.

Above undated message substituted from Template:Dashboard.wikiedu.org assignment by PrimeBOT (talk) 01:09, 18 January 2022 (UTC)Reply

Thanks to all contributors

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I created this article eight years ago just to explain a niche term of the then-expanding interest of urban exploration. Thanks for fleshing this out and adding useful published references! Todd Vierling (talk) 03:32, 1 January 2016 (UTC)Reply