The morning light slices through the cave mouth and pours into the hollow of Algar de Benagil like a spotlight. You push off from Benagil Beach and the Atlantic immediately makes its presence felt — a cool, steady push that nudges your kayak toward a line of orange cliffs. Sea spray chisels salt into your hair; limestone cliffs creak with age as the ocean continues to carve them. Within minutes the guide points the bow toward a narrow aperture and the group slips inside. The cave swallows sound and returns silence except for paddles tapping and the occasional laugh.