The Dipnaysupuan Tunnels were built deep into the rock face by the occupying Japanese during WWII using forced local labour; you can explore the tunnels with a torch. They're en route from Radar Tukon weather station towards Valugan Boulder Beach.
Batanes
The Dipnaysupuan Tunnels were built deep into the rock face by the occupying Japanese during WWII using forced local labour; you can explore the tunnels with a torch. They're en route from Radar Tukon weather station towards Valugan Boulder Beach.