Ridge with views of the volcanoes and Rabaul. Also known as 'Volcano Observatory'. Prior to the war, a volcano observatory was established on the ridge.

 

Wartime History
After news of the attack on Pearl Harbor, on Monday Australian Army positioned two anti-aircraft battery to the top of the ridge, and troops quartered at the observatory. This ridge went into action against the first air raid on January 4, 1942. Japanese occupied this area, and installed their own anti-aircraft guns. Also, they dug tunnels along Observatory Road that turns off Tunnel Hill Road.

Today
The present day observatory was established in 1980 and continues to operate to this day.