The Cheyne Gang - Chesham Bois, Buckinghamshire

Archaeologists in Chesham in Buckinghamshire believe they've found the remains of a medieval building under the manicured lawns of a Georgian house.
The owner of a Chesham Bois House, is a keen gardener. She's turned up 17th-century and medieval tiles beneath the greenhouse, uncovered medieval pottery in the flowerbeds, and noticed strange lumps and bumps at the bottom of the garden.