River Tamar
King Athelstan of England made the east bank of the River Tamar the boundary between England and Cornwall in the year 936. There are no road bridges over the lower Tamar apart from the modern Tamar Bridge at Saltash which was built to replace the ferry. In 1859 the Royal Albert Bridge was built across the Tamar at Saltash to carry the main railway line into Cornwall. Both bridges connect Saltash with Plymouth.