Like I have mentioned before these site fall into the category or Urban exploration they are explorable sites the reference proves that they fall into this category and its doubles up as a list of further reading for people who want to find out more about these sites and leads them to the exact location in Google maps  I also have new references concerning the recently remove content I found it in a newspaper article from December last year The Sydney Morning Herald something along the lines of an undercover reporter joining the cave clan temporarily and uncovering some of there sites the ones mentioned in the recently deleted content as soon as I fix the citation template I am adding the content back in