Nearly 10 years after its controversial excavation, the mystery remains. While the upturned oak tree and its ring of timbers have taught us a few things we didn't know about our ancestors, we still don't know why they built it.
Late in 1998, a long-forgotten landscape began re-emerging from beneath the sands of Holme Beach, near Hunstanton.
Beds of freshwater peat - all that remained of the salt marsh and forest which bordered the sea more than 4,000 years ago - were being uncovered by the tides.
There's a video at that link as well.