Barcelona’s beachfront boardwalk stretches for miles. It will take a good hour to get from Barceloneta to Diagonal Mar on foot, but it’s a walk that really helps you understand the city. The westernmost beaches like Sant Sebastià are busier and more touristy, but are backed by Barceloneta’s tight lattice of trendy shops and bars with terraces and outdoor seating.
As you move along the waterfront after the Olympic Port you’ll find a bit more room and more Barcelona locals. Finally, just up from Platja de Llevant is the massive and new Diagonal Mar mall, revitalizing a former industrial part of the city.