Natural Park Aquarium Boat Trip

This three-hour boat trip from San Antonio's port traces the northwest coast of Ibiza, starting at Cap Blanc Aquarium, a former lobster nursery carved into a sea cave where endemic species of the Pityusic waters still thrive. The route passes Cala Gració, Cala Gracioneta, Cala Salada, Cala Saladeta and Punta Galera before reaching the Margaritas Islands, a protected nature reserve off Ses Balandres. You'll have roughly 45 minutes to swim and snorkel in clear water, with glass-bottom boat views available for those staying aboard. The trip departs from Captain Nemo's kiosk in Puerto de San Antonio at 11:00am on Mondays, Wednesdays, Thursdays and Saturdays. Drinks—water, soft drinks, sangria, white wine and beer—are provided throughout, along with fresh fruit and snacks. Arrive 30 minutes early to check in. Snorkelling equipment and the glass-bottom boat access are included, letting you see what lives below the surface without diving.