(There is scant truth to the rumour that le Duc is in fact is named after the place).
See here for more dramatic footage than I have provided.
The walk itself is tough, though rewarding as the scenery is fairly awe inspiring. Headwear and boots are provided and essential.
The walk itself had been around since the 1902, then closed due to rockfall in the 50s, then reopened in the last decade (though with intermittent interruptions in terms of rockfall). Pioneered originally by then local engineer, Berkely Deane Wise, in order to show off his structural metalwork design skills in addition to pioneering railways in the area, it became a major attraction.
(Now it shows off the metalwork skills of a number of local companies).
A war memorial at the base of the climb. Dedicated to two members of a party of Belfast engineering students who died in WWI, and who used to visit the area before they went to France.