Uncovering the past
Â鶹Éç Wales's new series, Hidden Histories, is uncovering some fascinating stories, the latest being how Thomas Telford built the fabulous Pontcysyllte Aqueduct [watch here].
The programme uses graphics and computer images to show just how Telford's men built the 116ft (35m) tall bridge and its 18 piers over 10 years.
Next week's episode features another local landmark, the 9th Century Pillar of Eliseg, and how night photography is being used to recover any fragments of the eroded inscription on the monument.