Near where the O Brook tumbles into the West Dart and the Week Ford stepping stones, there are two blowing houses (tin mills), which are full of interest. The lower of the two buildings is known as Beara House and the upper on simply known as The Mill. It is not known whether the two buildings were in use at the same time.
Both mills are reasonably well preserved and each contain half a dozen mortar stones, a furnace and a wheel pit. The lower mill also contains two mould stones. The leat to the mills can easily be located and followed.