Near Pila F. Palu Co. Inc. Store, a road runs up the hill into Happy Valley, and on the side of this road, six World War II ammunition bunkers can be seen on the left before reaching a dirt road. The dirt road, also located on the left side, leads to a big concrete bunker which was used as naval communications headquarters during World War II. Over fifty pillbox fortifications can be found along the coastline on Tutuila Island. The largest of these is the Marine Corps communication bunker in Pago Pago. It is located in the Autapini area, which is between Malaloa and Happy Valley.