Bartlow hills, one of the secrets of Cambridgeshire. Four large mounds she two small ones, build as burial mounds in the Romano-British era of around 2000 years ago. One of the mounds is the second-highest artificial mound in England, the highest being the much better known Silbury hill in Wiltshire. But like Egypt's pyramids, to which Silbury is sometimes compared, here there is a group.











