San Quentin is a historic Spanish gunboat scuttled in 1898, now serving as an artificial reef in Subic Bay. The wreck lies at depths between 10 and 21 metres, with shallower sections reaching 6 to 10 metres. This site is accessible by boat and is suitable for beginners, though divers should be aware of potential hazards including boat traffic, entanglement risks, and overhead environments. Visibility varies significantly from 5 to 30 metres, and currents are generally mild. The structure supports a variety of reef fish and invertebrates typical of the region. Water temperatures remain warm throughout the year, ranging from 27C to 31C.

The Barges in Subic Bay consist of a series of sunken Vietnam War era steel barges and pontoons located northwest of Grande Island. These artificial reefs lie at depths ranging from 5 to 34 metres, with an average depth of 20 metres. The structures are scattered across the seabed and have been reclaimed by coral growth. Access to the site is by boat, located 1500 metres from the shore. Divers and snorkellers can expect mild currents and visibility between 10 and 20 metres. The site is suitable for beginners, though caution is advised regarding sharp coral and the presence of lionfish.

Canyons is a reef site situated on the west side of Grande Island in Subic Bay. The site is defined by its distinctive topography, featuring a series of canyons formed along the seabed. Divers can explore depths ranging from 5m to 30m, with an average depth of 15m. Access to this site is by boat, as it is located approximately 1000m from the shore. Conditions at the site are variable, with visibility typically ranging between 10m and 15m and moderate currents present. The site is suitable for divers of all experience levels.

LST is a wreck and artificial reef site located in Subic Bay, Philippines. This advanced dive site sits at depths ranging from 26 to 36 metres, with an average depth of 30 metres. Access is by boat only. Divers should be prepared for mild currents and visibility that fluctuates between 5 and 20 metres. The site presents hazards including deep water, potential for entanglement, overhead environments, and risks of nitrogen narcosis. Marine life in this region consists of typical reef fish and invertebrates associated with the habitat. Local facilities include dive shops offering air fills, boat charters, and guided tours.

Upside Down LCU is a Landing Craft Tank wreck located 500 metres offshore in Subic Bay. Resting at depths between 12 and 36 metres with an average of 24 metres, this site is intended for advanced divers due to its overhead environment and potential for entanglement. The wreck offers penetration opportunities for qualified divers. Conditions vary, with visibility ranging from 5 to 30 metres and mild currents. Access is strictly by boat. Divers should be aware of hazards including the depth, low visibility, and the presence of stonefish and lionfish. Water temperatures remain warm throughout the year, typically between 27 and 30 degrees Celsius.

Canyons Reef, located southwest of Grande Island in Subic Bay, is defined by its rock formations and canyons. The site features shallow plateaus starting at 4.5 metres, making it accessible for snorkellers, while divers can explore depths ranging from 3 to 20 metres with an average of 15 metres. Conditions generally include mild currents and visibility between 5 and 15 metres. Water temperatures remain warm throughout the year, ranging from 27C to 31C. Access to the site is by boat only. Divers should be aware of sharp coral in the area. Night diving is permitted, and typical dive times are approximately 60 minutes.

El Capitan is a wreck and reef dive site located in Subic Bay, Philippines. The site features a wreck resting at depths ranging from 3 to 22 metres, with an average depth of 17 metres. Access is by boat only, and divers should expect mild currents. Visibility at the site varies significantly, ranging from 3 to 25 metres. Water temperatures are warm, typically between 27C and 31C throughout the year. Due to the nature of the wreck, potential hazards include entanglement, low visibility, and risks associated with deep diving and nitrogen narcosis. Typical dive times are approximately 50 minutes.

Nabasan Reef is a reef and drop-off site located near Nabasan Wharf in Subic Bay. The topography features a wall that begins at a depth of 4 metres, extending down to 20 metres with an average depth of 10 metres. The site is characterised by a high density of hard corals and sea whips. Conditions are generally mild, though visibility can vary between 5 and 15 metres. Accessible by both shore and boat, the site is suitable for beginners. Divers and snorkellers should be aware of potential hazards including lionfish, sharp coral, and occasional strong currents.