Jacket's Field Long Barrow - Credit: Wikimedia Commons
Jacket's Field Long Barrow is an unchambered long barrow located near to the village of Boughton Aluph in the south-eastern English county of Kent. It was probably constructed in the fourth millennium BCE, during Britain's Early Neolithic period. Built out of earth, the long barrow consists of a sub-trapezoidal tumulus flanked by side ditches. Read more on Wikipedia
Source: en.wikipedia.org