Waldorf Salad is a classic American salad that can be found in Barcelona as well. It is made with crisp apples, celery, walnuts, and grapes, all tossed in a creamy dressing made with mayonnaise and lemon juice. The combination of sweet and crunchy ingredients creates a refreshing and satisfying salad. Waldorf Salad is a great choice for those who want to enjoy a taste of American cuisine while exploring the vibrant streets of Barcelona.