Madrid is the Spanish capital that quietly outshines flashier neighbors. The city runs on late nights, sun-flooded plazas and one of the highest concentrations of world-class art anywhere: the Prado, Reina Sofía and Thyssen-Bornemisza sit within a fifteen-minute walk of each other, forming the "Golden Triangle" of European painting.

But Madrid's real magic lives on the street. Locals gather in tapas bars at 9 pm, order small plates for two euros, and stay out until the metro reopens. Retiro Park is Madrid's outdoor living room — jog it in the morning, row a boat on its lake in the afternoon, and watch buskers under the Crystal Palace at dusk. The Mercado de San Miguel and La Latina's Sunday El Rastro flea market are among Europe's best food and browsing experiences.

Add flamenco, world-cup football at Bernabéu, day trips to Toledo, Segovia and El Escorial, and you have Spain's most well-rounded capital. It's less obvious than Barcelona, and richer in return.