The West Midlands is a metropolitan county in western central England with a population of 2.5 Million. It consists of seven metropolitan boroughs: the City of Birmingham, the City of Coventry, the City of Wolverhampton, Dudley, Sandwell, Solihull, and Walsall. This is one of the most heavily urbanised counties in the UK outside London. Unfortunately there is a disambiguation, as beneath this county the whole region is also called West Midlands.
The West Midlands have a long history of indstrialization. The early plus of the reagion was the continual growth of infrastructure, especially the canals. Boats were the easiest and fastest way to transport good, both raw materials for the numerous factories and the produced good. As a result there was a system of canals, and a huge number of canal tunnels. They were built during the Canal Age. Some of the most impressive tunnels are today open to the public.
Because of its geology and geography the area does not have natural caves. There are no important deposits, so there are no mines. The county has only subterranea for public inspection.