Cala Bona

A shallow shelf of rock and Posidonia meadow steps down from Cala Bona's own cove before falling away, on the seaward side, toward the wreck: a French steamer locally called the Tregastel, said to have gone down here in 1938. The hull is worked bow to stern at your own pace, with no fixed briefing route. Morays and conger hold the crevices, lobsters and sea slugs sit along the plating, and a marbled electric ray or a seahorse can turn up on the sand and rock in between.

Cala Bona is a wreck itinerary through and through, built entirely on the remains of the Tregastel, locally known also as the Pecio del Tregastel. The cove offers little beyond the water: no settlement, no restaurant, no accommodation, just the path down from Cala Jugadora and the wreck waiting below it.

An eco-briefing before the dive, and a ban on touching, removing or altering anything, wreck material included, apply throughout the park, as does the 80 cm limit on fin length; diving independently, without a centre, means filing your dive plan with the park authority in advance. The wreck itself invites more than a fly-by, with divers working it from bow to stern and in and around the hull. Treat any enclosed section the way you would treat an overhead environment generally: keep the exit in sight, and never go further in than your training and your gas allow.