Porthcurno played a pivotal role in the history of global telecommunications.
Porthcurno Telegraph Museum's Cable testing room houses a comprehensive collection of electrical test gear.
Porthcurno Telegraph Museum's instrument room replicates a complete working telegraph cable circuit.
Cable stations, especially those overseas, were required to make many of their own spare parts.
Porthcurno's main display room documents the development of submarine telegraphy.
These escape stairs were built to provide an emergency exit from the tunnels in the event of enemy attack.