Inside the Aquarium of San Sebastian.

© Heracles Kritikos/Shutterstock


Top choice in Parte Vieja

Fear for your life as huge sharks bear down behind glass panes, or gaze at otherworldly jellyfish. The highlights of a visit to the city's excellent aquarium are the cinema-screen-sized deep-ocean and coral-reef exhibits and the long tunnel, around which swim creatures of the deep. The aquarium also contains a maritime museum section. Allow at least 1½ hours for a visit.

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