The Landing Craft LCM3 is a compact wreck located 3200 metres off the coast of Two Harbors, Santa Catalina Island. Resting at a constant depth of 17 metres, this artificial reef is accessible only by boat. The site features mild currents and visibility averaging 5 metres, requiring careful navigation. Divers should be aware of potential entanglement hazards within the wreck structure and are advised to carry a torch. Water temperatures range from 14 to 18 degrees Celsius, necessitating appropriate thermal protection. Species recorded around this area include California sea lions, horn sharks, Spanish shawls, harbor seals, and Garibaldi.

Haggerty's Crane in Two Harbors is a shallow shore dive reaching a consistent depth of 8 metres. The site is defined by a kelp forest that provides structure over a rocky bottom, making it suitable for beginner divers. Visibility typically ranges from 5 to 10 metres. Divers should expect mild currents, though surge and swell conditions are common during shore entry. Water temperatures fluctuate between 15 and 19 degrees Celsius throughout the year, necessitating appropriate thermal protection. Exercise caution when navigating the shallows to avoid sharp rocks and coral. Facilities are not guaranteed on site, so divers should arrive prepared with all necessary equipment.

Flat Rock is a reef and kelp forest site located in Two Harbors, offering depths between 5 and 12 metres with an average of 8 metres. This location is suitable for intermediate divers and snorkellers, featuring mild currents and visibility ranging from 5 to 15 metres. The site is accessible by both shore and boat, though shore entries require caution due to potential surf, surge, and shore break. Water temperatures fluctuate between 15 and 19 degrees Celsius throughout the year. Night diving is permitted at this location, providing an alternative experience of the reef structure. Divers should confirm local facility availability before arrival.

The Palawan is an artificial reef and wreck site located 4000 metres off the coast of Two Harbors, Santa Catalina Island. The site sits in depths ranging from 5 to 38 metres, with the primary structure located at the deeper end of this range. Due to the depth and potential for moderate currents, this site is suitable only for advanced divers. Visibility typically fluctuates between 10 and 30 metres. Water temperatures remain consistently cool between 14 and 16 degrees Celsius throughout the year, necessitating appropriate thermal protection. Divers must be aware of active boat traffic and potential entanglement hazards on the wreck structure. Access is exclusively by boat.

The SS Avalon wreck lies at depths between 21 and 27 metres off the coast of Two Harbors. This artificial reef structure provides a focal point in an open-water environment, with visibility ranging from 5 to 21 metres. Divers should expect a thermocline at approximately 12 metres, where temperatures drop and visibility often improves. Water temperatures remain between 15 and 17 degrees Celsius, necessitating appropriate thermal protection. Currents are generally mild, facilitating navigation around the wreck. Due to the significant depth and active boat traffic in the area, this site is suited for intermediate divers. A surface marker buoy is essential for all ascents to ensure safety from passing vessels.

Redondo Breakwater is a shore-accessible artificial reef located off the coast of Santa Catalina Island. The site features depths ranging from 8 to 22 metres, with an average depth of 18 metres. Conditions are generally manageable for beginners, with mild currents and visibility typically between 5 and 15 metres. Divers should exercise caution regarding surge near the structure and remain vigilant for boat traffic when entering or exiting the water. Facilities including parking, toilets, and showers are available on site. A typical dive duration is approximately 40 minutes, and water temperatures range from 15 to 18 degrees Celsius throughout the year.

Veteran's Park on Santa Catalina Island offers a shore-accessible dive featuring a combination of artificial reef structures and canyon topography. With an average depth of 5 metres, this site is suitable for beginners. Divers frequently encounter California sea lions, horn sharks, East Pacific red octopuses, and garibaldi. Other species recorded here include scorpionfish, California spiny lobsters, and various nudibranchs like the Spanish shawl. Conditions vary with visibility ranging from 4 to 15 metres and mild currents. Hazards include boat traffic, surf, and a thermocline. Facilities at the site include parking, showers, and a rinse station. Night diving is permitted, with typical dives lasting around 40 minutes.

The SS Dominator is a wreck and artificial reef located off the coast of Two Harbors. Resting at depths between 15 and 25 metres, the site is accessible via both shore and boat entry. Divers should expect mild currents and visibility typically ranging from 5 to 10 metres. Water temperatures fluctuate between 14 and 18 degrees Celsius, necessitating appropriate thermal protection. The site is suited for intermediate divers, though surge and swell conditions require careful monitoring before entry. Navigating the wreckage presents entanglement risks, so divers should exercise caution when exploring the structure.