With a back catalogue stretching deep into the past, Britain has a wealth of riveting walks (sometimes literally) through its industrial and engineering past. We’ve put together a selection, but look around for others: transporter bridges (Newport and Middlesbrough) and disused railway viaducts (lots). And don’t miss spectacular new constructions, such as the Rolling Bridge in London’s Paddington Basin. Barmouth Bridge Mawddach estuary, Gwynedd Halfway across the estuary I stop and admire the panorama: the glittering waters of the Mawddach are spangled with seabirds, and behind them rise the ridges that lead to the peak of Cadair Idris. It is magnificent, but the bridge I am standing on is also impressive: Wales’s longest timber viaduct, 699 metres of wooden structure culminating in a great, rusty rivet-strewn swing bridge. It was opened in 1867 and is, I reckon, something of an engineering marvel, if only because it has survived attacks by some of the most … [Read more...] about Cast-iron classics: six great walks along Britain’s industrial waterways