Salamanca is the neighbourhood Madrid drew for its new money. When the city burst its medieval walls in the 1860s, the Marqués de Salamanca laid out a grid of broad streets and tall stone blocks to the north-east — straight, ordered, and built to look expensive. It still does.
A little over three kilometres, best on a weekday when the galleries are open and the pavements aren't given over to weekend shoppers. Start on Calle de Serrano, the shopping spine, and look up: the luxury names sit in buildings that were grand long before they arrived. Cut along José Ortega y Gasset — the milla de oro (golden mile) — then weave the side streets around Claudio Coello, where the contemporary dealers keep their doors open and their rooms quiet.
North up Calle de Velázquez for the full residential scale, all balconies and cut stone.
The walk earns its end at the Museo Lázaro Galdiano, a financier's mansion crammed with the Goyas and Bosches he couldn't stop buying — the most peaceful great collection in the city. Gregorio Marañón takes you home.