San Sebastián has one of the most interesting oceanographers on the Spanish Cantabrian coast next to the port. A journey through the history of the sea, of navigation, from the first boats that were built, going through how Basque fishermen went to Newfoundland to fish in small trawlers, to the great world navigators who were born here. In addition, it has an aquarium with an infinite number of marine species. From seahorses to sharks.