The definition Urbex according to Wikipedia:
Urban exploration (often shortened as urbex or UE) is the examination of the normally unseen or off-limits parts of urban areas or industrial facilities.
Urban exploration is also commonly referred to as infiltration, although some people consider infiltration to be more closely associated with the exploration of active or inhabited sites.
It may also be referred to as draining (when exploring drains) urban spelunking, urban rock climbing, urban caving, or building hacking.
So, only these kind of picturs will be accepted by this group.
Also the photo has to mean something in any kind of artistic way.
So just a picture of a pile of junk will be declined,....
...,or convince us why not.
So the submitted art has to be primary related to Urban exploration.
Or in the notes an explanation that relates to the Urbex scene.