Barcelona
If you're a fan of the major brands, you won't want to miss the Passeig de Gràcia. It is an avenue full of modernist buildings and all of the world's most luxurious and well-known brands. But if you're looking for something a bit more alternative, you should check out the famous carrer dels Tallers, which is brimming with charming little shops selling artisanal products, music and vintage clothes.