6. Albarracin, Spain
Your first step in this dreamy village atop a mountain will take you straight to the Middle Ages. The architecture is medieval and the streets are narrow, thanks to the failure of modernization at casting its spell on this pretty little history. Take a morning walk along Rio Guadalaviar, hear the whispers of Dona Blanca legend, and wash it down with cerveza (beer) at La Plaza Mayor, a local bar.