Glamorganshire Canal
This long-lost canal was once one of Britain's busiest.
Hundreds of boats plied the canal between Merthyr Tydfil and Cardiff, serving the local ironworks and coal mines. Even thought it had two locks per mile over its 25-mile length, the canal was enormously profitable.
But its fortunes declined sharply after the coming of the railways. The canal eventually fell into disrepair, and roads, factories and housing estates were built over its course. Though highly unlikely ever to be restored, the canal is still easy for the walker or cyclist to discover.
