Bartlow is also home to Bartlow Hills, a Roman tumuli cemetery with four remaining mounds, though only one falls into the parish of Bartlow. Originally, all of the Bartlow Hills were in Essex County and were part of the parish of Ashdon, a village in Essex, (1.5 miles south) when the boundary between Cambridgeshire and Essex ran from Steventon End to the River Granta, then along the Granta westwards to Linton, as shown on Ordnance Survey maps including those dated 1805, 1838 and 1882.