Archaeologists have uncovered a what they suspect to be an Iron Age road, made of timber and preserved in peat for 2,000 years, in Geldeston, near Bungay.
Following excavations this summer, archaeologists have revealed that the site may be part of an ancient causeway which crossed the River Waveney and the surrounding wetlands.
Although exact dating has yet to be carried out, such causeways have been found in the area before.
It is thought that they date from the pre-Roman era, when the area was home to the Iceni tribe.
By studying tree ring data, the timber road has been provisionally dated to 75BC, more than a century before the Roman invasion when legions clashed with the Iceni and their fearsome leader Boudicca.