The Recreation: Outdoors: (Urban Exploration Outdoors )

Urban exploration involves exploring (usually abandoned) man made structures such as ghost towns and derelict houses, old mines, rail tunnels, closed factories, and public infrastructures such as storm water drains and bridge rooms. Also known as industrial archaeology. Urban Exploration Outdoors Recreation.

Urban exploration (often shortened as urbex or UE, and sometimes known as 'roof-and-tunnel hacking') is the exploration of man-made structures, usually abandoned ruins or not usually seen components of the man-made environment. (wikipedia)