La Jolla Cove & Canyon

This is a shore-diving town, and the day runs on the surf forecast rather than a charter schedule. Divers park early before the beach lot fills, kit up on the sand, walk out through the small breaking waves and surface-swim past the marker buoys before dropping. Shops a few streets back handle fills and rentals, and nothing needs booking. Organised night dives are the exception, run in groups with torches, and day boats reach the outer kelp beds when the wind allows.

Three different bottoms sit within a couple of kilometres of each other. At the rocky point under the cliffs, reef and kelp break into ledges and surge channels that work best on a calm morning. North-east of there the shoreline flattens into a wide beach fronting a plain of open sand that looks empty until you learn to read it: halibut buried flat in it, guitarfish and rays cruising over it. Cutting through that plain is the canyon head, found by watching your depth rather than by any landmark on the bottom.

Visibility is the constraint and it shapes technique. The surf zone keeps sand in suspension, so the first minutes are usually the murkiest, and photographers work close with macro rather than wide. Navigation is done on compass headings out and back, which makes this a genuinely useful place to build that skill instead of following a guide's fins. The animals, for their part, are habituated to divers and rarely bolt, so an encounter tends to last as long as your patience does.

It suits new divers, night divers and macro photographers, and anyone who wants to dive often without paying for boats; training agencies use the sand flats for the same reason. The trade-off cuts both ways. Divers after long sightlines, hard coral or dependable blue water will find the place underwhelming, and the surf entry, modest as it usually is, remains the one thing that catches people out on a first visit.