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.

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.

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.

Blue and White is a varied dive site in Apra Harbor, Guam, featuring a combination of reef, wall, and artificial reef structures. Located 1000 metres from shore, the site requires boat access. Divers encounter a drop-off that begins at approximately 12 metres, descending to an average depth of 33 metres, with a maximum of 39 metres. Conditions include moderate currents and visibility ranging from 12 to 30 metres. Marine life recorded here includes wrasses, pufferfish, emperor angelfish, regal angelfish, and various butterflyfish and anemonefish. Due to the depth and current, this site is suited for intermediate divers. Hazards include sharp coral, strong currents, and surf.

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.

Spanish Steps in Apra Harbor, Guam, is a shore-entry site featuring a combination of natural reef and artificial reef structures. Suitable for beginners, the site offers an average depth of 7 metres, with a maximum depth of approximately 9 metres. Divers can expect mild currents and visibility ranging from 15 to 30 metres. Water temperatures remain warm throughout the year, typically between 28C and 30C. The site is accessible for night diving, with parking facilities available nearby. Divers should remain cautious of boat traffic in the area, as well as the presence of sea urchins and sharp coral on the reef.

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.

Finger Reef is a sloping reef located 500 metres from shore within Apra Harbor. The site features a depth range of 2 to 27 metres, with an average depth of 15 metres. Access is by boat only, and divers should be aware of moderate currents and boat traffic in the area. The topography consists of sloping coral formations. Due to the presence of sharp coral and jellyfish, appropriate exposure protection is recommended. This site is suitable for beginners and offers a typical dive duration of 45 minutes. Visibility at the site ranges from 9 to 27 metres, with water temperatures remaining between 28 and 30 degrees Celsius throughout the year.