Even on a tight schedule, Barrio de las Letras earns the hours.
Allow 1–2 hours.
An atmospheric, walkable wander between the Prado and Sol, with Golden-Age writers' quotes underfoot, the oldest restaurant in the world, and good vermouth bars on Calle Huertas. The catch is the literary theme is subtle — it's a pleasant stroll-and-tapas zone, not a headline attraction.