Museo Chicote bar on Gran Vía: Penélope Cruz drowns a secret in gin and tonics in Almodóvar's “Broken Embraces” (2009).
Beneath your feet at Puerta del Sol, the Kilometre Zero plaque was reset backwards in 2002, east and west swapped, then hastily fixed.
At Chocolatería San Ginés, open 24/7 in its alley near Plaza Mayor, dip churros into thick hot chocolate at 3 a.m.