Santa Marta & Tayrona

A day here starts on Taganga's beach, where open boats load straight off the sand and run a few minutes around the headland. Operators usually put two tanks in before lunch, take the surface interval in a cove, then give the afternoon over to course dives, which is why the same handful of bays fill and empty on a rhythm. Sites are close and shallow enough that a night dive is an add-on rather than an expedition, and a couple of the beaches can be walked into.

The Sierra Nevada drops straight into the sea here and the diving follows that geology: boulders stacked into ledges and swim-throughs, rock faces running onto sand, sponge and gorgonian cover rather than hard-coral framework. Corals grow, but in patches on rock. Sites differ mainly by exposure. The outer points catch current and hold schooling fish, while the enclosed bays stay calm and a little silty, and that is where the small subjects live. A few sunken vessels add another texture.

The water changes character twice a year and the diving changes with it. Through the middle of the year it is warm and settled, open enough for wide-angle work on the points and for longer profiles at the deeper headlands. From December into April the cold, nutrient-heavy water pushes in: dives get shorter, 3 mm stops being enough neoprene, and a torch earns its place even at midday, but invertebrate life is at its most active. Anyone who enjoys hunting small subjects gets more from this coast than anyone chasing visibility.