Apra Horbor, located in Piti, has a variety of activities happening in its calm, deep waters. Every kind of marine activity that happends on Guam can be experienced in the harbor, fishing, dinner cruises, jet skiing, diving, submarines its all there. However, most company offices are not located there, so contact the offices by phone or through an agent to inquire about specific activities. Also of interest to many divers, are the World War I & II shipwrecks that can be explored in the harbors waters.