 The Sweet Track is an ancient causeway in the Somerset Levels , England . It was built in either 3807 or 3806 BC and was the oldest timber trackway discovered in Northern Europe until the 2009 discovery of a 6 @,@ 000 @-@ year @-@ old trackway in Plumstead , London . It is now known that the Sweet Track was predominantly built over water. nobody knows what the track was used for, but it is possible that it was a way for people to walk over the swampy areas of the Somerset Levels.
The Sweet Track was discovered in 1971 by the RSPB when they were building a new reserve at M