After a day of shopping or visiting museums in Rotterdam you can sit by the Maas river to catch your breath and relax.
For example by visiting the Erasmus bridge which is a great example of the aspiring mentality and youth of the city thanks to its design.
Another reason for visiting the area is the presence of the Walk of Fame near the Erasmus Bridge. Many international stars have followed the Hollywood example and placed their hands and feet in cement so you can literally step into their footsteps.
Video Erasmus Bridge