Buenos Aires rewards the flâneur like few other capitals. Its narrow one-way streets, restaurant terraces spilling into the lanes, and plane trees that deepen the mood rather than lift it, all seem built for café-hopping — and the city delivers some of the most atmospheric coffee houses in the world, most still cheap enough for students and locals.

The granddaddy is Café Tortoni, a 19th-century institution whose regulars included Jorge Luis Borges and generations of Argentine writers and tango legends. Wood panelling, Belle Époque stained glass and walls crowded with old photos give it the feel of a library crossed with a museum — expect a queue for a table, uniformed waiters and excellent pastries, plus a good mix of tourists and porteño regulars.

Near the Plaza de Mayo and the presidential palace, the ironically named London City café served the writer of the source piece what he calls the best breakfast of his life: toast, butter and marmalade, eggs and coffee, arriving in quantities that barely fit the table. Framed photos of Julio Cortázar line the walls, with extracts from his novels set right here.

In San Telmo, the bohemian quarter with its famous Sunday market, El Federal is a corner café dating to the 1890s — or at least appearing to. In truth it was an old shop and beverage dispensary (and briefly, less glamorously, a brothel) that was restored between 1930 and 1960. Ceiling-high shelves of dusty wine bottles, pickle jars and salamis, vintage posters and a clock in a wooden arch over the bar make it feel gloriously untouched, even if the story is more revival than survival.

The showstopper is El Ateneo Gran Splendid, voted the world's second-best bookshop by The Guardian. Built as a theatre in 1919 on the site of an earlier 1903 playhouse — and later a tango recording label's home — the restored auditorium keeps its chandelier, painted ceiling and opera-house curtains, with bookshelves where the stalls once were and a café on the stage. The crowds rival those outside major museums, and signs reading 'no weeping' are only half a joke. There's even a balcony reading room with plush seats, though you can't curl up indefinitely; finish your Bleak House at home.

Serious readers should also dig into San Telmo's side streets: the writer stumbled on a tiny shop where, unusually for Argentina, the entire stock was in English — and roughly two-thirds of it matched his own wishlist.

Why it matters: this is a city break where the best activities cost the price of a coffee and a paperback. Literature lovers, architecture fans and anyone who likes their sightseeing seated with pastries will find few places that do it better.