Clare explores the Lower Tavy Valley in Devon with Sharon Gedye a physical geographer who's spent years discovering how the area's rich history has shaped its landscape and people.

Sharon takes Clare on a circular walk starting on West Down, on the western edge of Dartmoor, heading down towards the River Tavy and eventually reaching Double Waters, the confluence of the Tavy and Walkham. On the way they see evidence of arsenic mines, copper workings and discuss long forgotten but fascinating fish weirs.

Sharon is also interested in how humans shape landscape and how landscape shapes us. Thinking of her grandfather, she says: He was a quarry-man on Dartmoor and by picturing him working and polishing the granite, I feel closer to how he experienced the world.

Also on the walk are two of Sharon's friends who bring their own areas of expertise to their interpretation of the area: archeologist Chris Smart, and heritage consultant, Andrew Thompson

Sharon writes a blog which you can find at www.awalkinenglishweather.com They met at WhatThreeWords: grin.tend.negotiators / Grid Ref: SX479708

Presenter: Clare Balding