The Cathedral
Depth is the range from the top of the site to its usual maximum; "recommended cert" is the mainstream-agency level operators usually ask for, not a legal rule. Currents and visibility change daily — treat everything here as planning ranges.
Flic en Flac's signature dive drops down a coral-crusted wall into a vaulted cavern where the site earns its name: light falls through openings in the ceiling in tight, angled beams, and divers hang in a blue-lit nave watching soldierfish and sweepers circulate along the walls. Lobster pack the crevices, morays and scorpionfish hold the ledges, and outside the entrance the wall carries on past sponge-crusted overhangs toward 30 meters. Timing matters — surge amplifies inside on big-swell days and the cavern rewards small groups — but on a clean morning it is the west coast's best hour underwater.
The moment you come for: Light beams inside the cavern; lobster-packed crevices; sculpted wall terrain
Topography: Fringing-slope wall cut by a large cavern, arch, and chimney formations
Current: Generally calm on the leeward west coast; surge reaches the cavern when swell wraps in.
Know before you splash
Hazards: Overhead environment in the cavern, surge, and depth at the base of the wall.
Conservation: Fins and gauges scar cavern walls fastest — trim tight in the confined sections.
Nitrox: Worth it here — profiles sit in the range where enriched air meaningfully extends no-stop time (with the training to use it).
Who you'll meet
Giant Moray Eel
Lionfish
Nudibranchs
Porcupinefish
For photographers
Wide angle: ★★★★★ · Macro: ★★★☆☆ — editors' 1–5 rating of what this site gives each style of shooting