This is not a very notable tunnel being very short, it is on the defunct rail line between Crieff and Comrie running alongside the River Earn in Scotland but its got a nice contrast of lined and unlined sections of the tunnel. Located off of an apparently nameless lane that runs between the A85 and Strowan Road, west of Crieff.
exact location::
56°22'21.1"N 3°54'31.0"W
exact location::
56°22'21.1"N 3°54'31.0"W