Posts containing pictures of Urban Exploration (UE, Urbex). Urban Exploration is the examination of the normally unseen or off-limits parts of human civilization. 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. In the USA, Urban Exploration may also be refered to as “reality hacking,” “urban spelunking,” and “urban caving.” (Sourced from Wikipedia)