Iron Furnace

A squat stone structure rising from the Northamptonshire countryside, the Iron Furnace is a proper relic of medieval industry that most people drive past without a second glance. Built in the 15th century, it's one of the oldest blast furnaces in England - basically a tower where iron ore was smelted using charcoal, part of a process that fed the nation's metalworking ambitions. The furnace itself is surprisingly compact, which is half the appeal. You can walk right up to it, run your hand along the stonework, and actually imagine the roar and heat that would have come from inside.

It's a 20-minute stop rather than a full afternoon affair, and honestly, that's fine. History enthusiasts will get genuine value from standing in front of something this old and functional. Kids might be less impressed unless they're already interested in industrial heritage - there's no playground, no café, no visitor centre. Just archaeology and a bit of peace. Free to visit as far as anyone knows, and it sits handily near Northampton, making it a logical add-on if you're camping in the area.

Blisworth Park and Kirkely Meadows are both within five miles, so it works well as a morning walk from either site. The fields around it are lovely enough, though nothing spectacular. Worth the detour if you're already staying locally and keen on England's industrial past. Skip it if you need facilities or entertainment value.