The West Kennet Long Barrow is a Neolithic tomb found in Wiltshire, England that dates back to about 3650 BCE. Researchers believe that the tomb was used for about 1,000 years and was sealed sometime around 2000 BCE – the main passage was filled with earth, stone, rubble, and debris. Then the forecourt was blocked with sarsen boulders and a false entrance and finally, three massive sarsen blocking stones were placed across the front of the tomb.
The tomb was first excavated in 1859 and then again in 1955-1956 and researchers found at least 46 individuals within the barrow, ranging from babies to elderly persons.