Talofofo Pillbox is located in Guam

The Talofofo Pillbox is a historic World War II-era defensive fortification in Talofofo, Guam. It is located near the coast, about 127 metres (417 ft) south of the mouth of the Togcha River and 27 metres (89 ft) inland from the high-tide line. It is roughly 2.75 by 3.0 metres (9.0 ft × 9.8 ft), built out of concrete and coral limestone. Its walls are about 0.5 metres (1.6 ft) thick, with an embrasure providing a view of the Togcha River, and a window looking over the coast to the east. Its entrance is on the landward (south) side. This structure was built under the direction of the Imperial Japanese Army during its occupation of Guam in 1941-44.

• http://en.wikipedia.org/wiki/Talofofo Pillbox