During the Second World War, Tutuila was a training area for the U.S. Marines, and the most tangible relics of this period are two huge six-inch (150mm) naval guns that have surveyed the mouth of Pago Pago Harbor since 1941. Like many other tourist attractions on Tutuila, the guns are overgrown and hard to find: From the oil storage tanks at Utulei, walk southeast along the highway until you see a small pump house on the right. Behind this is a track up to a large, green water tank on the ridge. The guns are a little higher, accessible via concrete steps.