The area of Bristol known as Clifton sits on the top of the hill overlooking the Avon.  To get from the water to Clifton is quite a climb.  These days you would drive up there but, in the days, when vessels would be bringing passengers in by boat along the river, an alternative was required.  The Clifton Rocks Railway was the solution.  This was a funicular railway that ran in a tunnel from alongside the river up to near the suspension bridge.

Built in the 1890s, it operated until the 1930s when the decline in passenger numbers meant it was no longer viable.  The tunnels were used as office space during the Second World War with the BBC being one of the tenants and they continued to use the space into the 1960s.  There is now an effort to restore aspects of the tunnels although the railway will never operate again given the usage the tunnels have had since service ended.  The station at the bottom is still visible but is now alongside a busy roadway so might easily be missed as you drive past.