Wheal Martyn

Wheal Martyn near Truro is a heritage museum and industrial site set in 26 acres of Cornish clay-country grounds and dogs are welcome inside as well as out on the trails.

The museum itself, the Discovery Centre, the shop and the café are all on-lead accessible, which means no pavement-waiting shuffle and no splitting up the group while someone browses Victorian beam engines and someone else does laps of the car park with a bored terrier. The site works as a realistic day out: woodland trails, indoor exhibition spaces and family visit facilities all built around Cornwall's china clay story. There's parking on site, including disabled spaces close to the museum and the café is dog-friendly too, so you can settle in with a cuppa and a lead looped round a chair leg after a proper mooch round the grounds and galleries.

It's close enough to Truro for straightforward day planning and the mix of indoor shelter and outdoor sniff-breaks makes it handy when the weather turns theatrical or you just want a calmer heritage outing that keeps paws and people together.