We had a quick stop in Antwerpen on our way to Brugges and enjoyed our day out. Though I think you need a bit more time to actually explore the cute areas of the city.
However, we enjoyed the shopping and the food. We found a little restaurant called Berlin (can’t escape Germany no matter how hard you try) which had lovely sandwiches and loads of locals. The coffee shop we stumbled upon was so quaint and the tea was amazing after walking in the rain. Not exactly the prettiest of cities but great for a day trip!