First Cathedrals is a distinctive cavern and reef site located within the Molokini Crater. Divers access the site by boat to explore an expansive lava rock cavern system featuring skylights that illuminate the interior. The topography includes a central altar and smaller side chambers known as confessionals. Depths range from 4 to 18 metres, with visibility typically between 15 and 30 metres. Conditions include moderate currents and surge, requiring intermediate skill levels to navigate the overhead environment safely. Dives typically last 45 minutes. Water temperatures remain consistent throughout the year, ranging from 25 to 26 degrees Celsius.

Fish Rock is a shallow pinnacle and reef located 45 metres from shore at Molokini Crater. The site features a top covered in soft moon corals that move with the water. Divers and snorkellers can expect mild currents, though conditions may include surge and surf. Visibility is generally high, reaching up to 100 metres. Access to this site is by boat only. The location is suitable for beginners, though visitors should remain aware of potential strong currents in the area. Facilities available at the site include toilets, showers, and changing rooms.

Hulopoe Bay is a protected Marine Life Conservation District featuring a crescent beach and a rocky reef. Snorkelling is best along the reef on the east side of the bay near the tide pools. The site is suitable for beginners, with depths ranging from 1 to 7 metres and an average of 4 metres. Visibility is high, typically between 30 and 46 metres. Divers and snorkellers regularly encounter wrasses and redlip parrotfish. Other species recorded here include Achilles tang, black durgeon, bluefin trevally, yellow tang, guineafowl puffer, bird wrasse, palenose parrotfish, freckled hawkfish, Hawaiian convict surgeonfish, moorish idol, Pacific bullethead parrotfish, and groupers. Be aware of boat traffic, rip currents, and surf.

Manele Bay is a reef site located adjacent to the small boat harbour. The topography features a diverse reef structure, with coral growth most abundant along the cliffs on the sides of the bay where the bottom drops off. Depths range from 3 to 40 metres, and visibility varies between 10 and 40 metres. The site is accessible by both shore and boat, making it suitable for beginners. Conditions include mild currents, though visitors should be aware of potential hazards including jellyfish, sharks, strong currents, and surf. Facilities available at the site include parking, showers, toilets, and a rinse station.

Sergeant Major Reef is located within the Molokini Crater and features three distinct lava fingers that form underwater canyons. This site is suitable for beginners, with depths ranging from 5 to 15 metres and an average depth of 10 metres. Access is by boat only, as the site is situated 6436 metres from the shore. Divers and snorkellers should be aware of moderate currents and visibility that typically fluctuates between 3 and 10 metres. Hazards at this location include jellyfish and sharp coral. Water temperatures remain consistent throughout the year, averaging between 25 and 26 degrees Celsius.

Knob Hill is a marine dive site located at Molokini Crater, featuring a combination of reef, drift, and cave topography. Divers typically experience depths ranging from 7 to 18 metres, with an average depth of 12 metres. Access to this site is exclusively by boat, as it is situated approximately 1000 metres from shore. Conditions at this location are variable, and divers should be prepared for strong currents, which are a known hazard. A typical dive at this site lasts around 40 minutes. Due to the current and site characteristics, this location is best suited for intermediate divers.

Cathedrals at Molokini Crater is defined by lava-formed caverns and caves that create dramatic light effects within the overhead environment. The site features a mix of reef, wall, and drop-off terrain at depths ranging from 9 to 23 metres. Visibility is consistently 30 metres. Access is by boat only due to surf conditions at the shore. Divers should be prepared for moderate to strong currents and exercise caution when navigating the overhead sections. Species recorded around this area include groupers and Pacific White-spotted Sea cucumbers. This site is suited for intermediate divers who can maintain buoyancy while exploring the underwater structures.

Second Cathedral is a cavern and pinnacle site located 12.8 kilometres off the coast of Maui. Divers typically descend onto a pinnacle before navigating into the central hall of the cavern. The site features an overhead environment and reaches depths between 9 and 30 metres, with an average depth of 18 metres. Due to the presence of strong currents and the overhead nature of the cavern, this site is suited for intermediate divers. Visibility ranges from 15 to 45 metres. Access is by boat only, and dives typically last 60 minutes. Hazards include deep water, overhead environments, sharp coral, and strong currents.