The Paseo de Recoletos is Madrid's literary boulevard — the shaded promenade where the city's writers drank their coffee and argued their politics, running north from Cibeles to the bombast of Plaza de Colón. A morning walk, built around one great café and a national library.
Under three kilometres, flat and tree-lined the whole way. From Cibeles, take the central walkway up Recoletos to the Gran Café de Gijón, open since 1888 and still trading on the tertulia (a regular table of talkers) that made it famous — sit on the terrace and let the price buy you the room. A little further stands the Biblioteca Nacional, its steps guarded by stone writers; the grand staircase and the museum inside are free.
Behind it the mood turns hard and modern: the Jardines del Descubrimiento, a raised concrete plaza with three vast blocks cut for Columbus, and beyond them Plaza de Colón under its enormous flag.
Then back south to the garden terraces under the planes for a drink, with Colón Metro waiting when you're done.