Barge Reef in Apra Harbor, Guam, features a WWII Amtrak wreck resting in a sand channel at a depth of 12 metres. The site is an artificial reef structure surrounded by a natural reef. Divers can access the site by boat or from the shore, located approximately 500 metres out. Conditions vary, with visibility ranging from 5 to 25 metres and moderate currents present. Due to the potential for strong currents, this site is suited for intermediate divers. Typical dives last around 45 minutes, with water temperatures remaining warm between 28C and 30C throughout the year.

Val Bomber is a Japanese aircraft wreck located in Apra Harbor, resting against the side of a reef. The wreck lies at a depth of 26 metres, with the site ranging from 9 to 30 metres. In addition to the aircraft, divers can explore numerous barges situated in the shallower sections of the site. Access is by boat only, and the site is suited for advanced divers due to the depth. Conditions typically feature mild currents and visibility ranging from 9 to 15 metres. Water temperatures remain consistent throughout the year, between 28 and 30 degrees Celsius.

The American Tanker is a concrete barge located in Apra Harbor, Guam, originally used to transport fuel during World War II. This artificial reef sits at depths ranging from 8 to 36 metres, with an average depth of 25 metres. The wreck is accessible only by boat and is suited for intermediate divers due to the overhead environment. Divers should be aware of boat traffic in the area. Visibility typically ranges between 6 and 18 metres, and water temperatures remain consistent between 28 and 30 degrees Celsius throughout the year. The site offers a unique opportunity to explore historical maritime remains in a marine environment.

Harley Reef in Apra Harbor, Guam, is a unique dive site featuring both reef topography and a historical wreck. The site is notable for a 1944/45 WLA Flathead Harley-Davidson motorcycle resting at a depth of approximately 3 metres. Beyond the wreck, the site consists of a sloping wall covered in coral. Divers can expect depths ranging from 3 to 37 metres, with an average depth of 15 metres. Conditions are generally mild, though visibility fluctuates between 2 and 27 metres. Access to this site requires a boat. Due to the presence of sharp coral, divers should exercise caution when navigating the area.

SeaBee Junkyard in Apra Harbor is an artificial reef site featuring a collection of heavy equipment, including bulldozers, abandoned by the Seabees following the construction of the breakwater. The site also contains a small transfer ship resting on the seabed at a depth of 40 metres. Divers can explore this underwater industrial site at depths ranging from 11 to 40 metres, with an average depth of 14 metres. Access to the site is by boat only, located 183 metres from the shore. Conditions include moderate currents and visibility ranging between 6 and 18 metres. Water temperatures remain consistent throughout the year, typically between 28 and 30 degrees Celsius.

Apra Harbor Reef offers a varied underwater landscape for intermediate divers, with depths ranging from 2 to 30 metres and an average of 15 metres. This shore-entry site features a reef structure that slopes from the shallows into deeper water. Divers should be prepared for moderate currents, which can strengthen unexpectedly; planning the dive around slack tide is recommended. Visibility typically fluctuates between 5 and 15 metres. Water temperatures remain consistent throughout the year, ranging from 28 to 30 degrees Celsius. Due to the potential for strong currents, divers must monitor their position relative to the reef throughout the 45-minute dive duration.

Vecky's Reef is a marine site located within Apra Harbor, Guam. The site features a consistent depth of approximately 9 metres, though depths in the surrounding area can reach 20 metres. Access to this location is by boat only. Divers and snorkellers should be aware of moderate currents and potential boat traffic in the vicinity. Visibility at the site typically ranges between 12 and 21 metres. Water temperatures are warm throughout the year, ranging from 28C to 30C. This site is suitable for beginners, provided they are comfortable with the prevailing current conditions.

The Kitsugawa Maru is a freighter sunk in July 1944 that sits upright in Apra Harbor. The wreck remains approximately 80 percent intact, featuring a large bow gun and masts that begin at 18 metres. Divers can expect depths ranging from 15 to 42 metres, with an average of 27 metres. This boat-only dive is suited for advanced divers due to the depth and overhead environment. Visibility varies between 4 and 20 metres, and moderate currents are common. Marine life frequently recorded at the site includes pufferfish and wrasses, alongside less common species such as Pacific doublesaddle butterflyfish, threadfin butterflyfish, flagtail triggerfish, and blackback anemonefish.