The Grade I-listed, 18th-century Hadlow Tower - or 'May's Folly' as locals call it - is the tallest Gothic folly in the world and boasts four bedrooms over five floors.
Kemeys Folly, which is set in 24 acres of land in Newport, Wales, was put up for sale for £1.85m after its stunning renovation featured on the Channel 4 programme but failed to find a buyer.
The Folly, nestled in the sprawling Norfolk estate, was once used by King Edward VII - 'Bertie' - to entertain his mistress, the British actress and socialite Lillie Langtry.