Urban exploration (often shortened as urbex or UE) is the exploration of man-made structures, usually abandoned ruins or not usually seen components of the man-made environment. Photography and historical interest/documentation are heavily featured in the hobby and, although it may sometimes involve trespassing onto private property, this is not always the case and is of innocent intention. 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.
Thailand is an amazing country! While there I enjoyed a bit of underground hobby called Urban Exploration. Urbex is a popular passtime in Europe, and is gaining popularity here in the West. There are a few cool websites that you can find simply by Googling the term.
While doing some reconnaissance and research in Bangkok (BKK) I found that it boasted the highest number of abandoned buildings per capita than any other city on Earth. It's basically an urban explorer's dream play land.
I took a staggering amount of images during my downtime in Thailand. Can't wait to go back!