Piercebridge was the location that the Roman Dere Street crossed the Tees, the course of the river has changed so much since Roman times that the remains are now in a field about 100m south of the river.
The remains were found during quarrying in 1972–3, the bridge itself was wood but the stone abutments and piers are to be seen today, the pavement of blocks exists to stop the piers being undermined.
Interesting – I remember a ‘Time Team’ program covering Roman activity in the upstream Tees area a few years ago. Good post!