GWF

The Great Western Railway viaduct near Castle Cary is a proper Victorian engineering feat that stops you in your tracks. Built in the 1850s, this wrought-iron structure carries trains across the landscape with the kind of confident design that makes you understand why the Victorians thought they could build anything. You'll want to walk underneath it to appreciate the scale - the span is genuinely impressive, and on a clear day the stonework catches the light beautifully.

It's not a destination that demands hours of your time, but it's absolutely worth a 20-minute detour if you're driving through Somerset. History buffs will find it satisfying, and photographers get good angles from multiple spots around the base. The viaduct is free to view from the surrounding lanes and footpaths, though there's limited formal parking - you'll likely find a spot nearby.

If you're based at Hadspen Glamping (just 2.8 miles away) or Sunnyhill Campsite further out, this makes an easy morning walk or cycle ride. Combine it with a wander around Castle Cary itself, which has enough charm to justify an hour's exploration. The viaduct also fits neatly into a wider ramble through the Somerset countryside - walkers particularly appreciate how it sits within the local footpath network. Don't expect visitor facilities or anything fancy. This is about appreciating Victorian engineering in its proper context: striding across farmland, quietly getting on with the job it was built for.