La Barceloneta is the old fishermen district as it's located in front of the sea. Many restaurants and bars are established there to serve the best fish and seafood of the city!
You can spend a whole day in those beaches as peddlers sell from fresh coconut and soft drinks to food and even biquinis!
Today a touristic place with the contrast of those small and narrow streets from the heart of la Barceloneta where live the very native people of the district.
There you have also many entertainment places as IMAX or the History Museum.