Start with “From Puerta del Sol to Plaza Mayor”. You start beside the Bear and the Strawberry Tree and find out how a crossroads worth less than the Plaza Mayor became the point from which Spain's roads are measured: a clock that replaced a bell, a post office with a guardroom where the staircase should have been, the afternoon of the Mamelukes in 1808 and the Kilometre Zero plaque. Along Calle Mayor you reach the mentidero, the steps where Madrid heard all the news, and then walk into the Plaza Mayor: five names, plaque by plaque, a bronze horse that came from Florence and blew up in 1931, the false fire alarm of 1631, and houses eight storeys high standing over the moat of the old town wall.
Then there’s “Crimes and Legends of Habsburg Madrid”. In Habsburg Madrid, people were locked up, tried in public and made things up. You start in front of the Court Prison and follow the condemned on their way to the Plaza Mayor: what an auto-da-fé really was and where the fires did not burn, how Rodrigo Calderón fell in the very square he used to ride across, and how much truth there is in La Calderona's balcony.
For another side of the city, try “The Gran Vía: From Zarzuela to War”. The Gran Vía was sung about before it was built. You start in the Plaza del Rey, in front of a sixteenth-century house stormed in the Esquilache riot and next door to Godoy's, and hear how in 1886 a musical revue turned an avenue that never arrived into a joke: "Well, you'd better wait sitting down.
Choose by neighbourhood or by the stories that interest you: each route shows its distance, stops and approximate duration before you set off. The audio is written for walking, with a clear distinction between documented events and local legend. Download it in the app, put on your headphones and pause whenever something catches your eye. English and Spanish are included.