9. Calle Serrano – Madrid, Spain
Situated in the posh Salamanca district, Calle Serrano is Madrid’s finest shopping street, offering a mix of luxury labels and Spanish fashion icons. You’ll find stores like Loewe and Massimo Dutti alongside upscale boutiques and department stores. With wide sidewalks, tree-lined avenues, and historic architecture, it’s as stylish as it is serene.