The hippest place to stay is Hotel Only You, which, in a 24-hour city, is in the midst of the action. This former palace dates back to the nineteenth century and still boasts beautiful arched windows, Juliette balconies and window shutters. Its location means the trendy Chueca and Salesas neighbourhoods, with an abundance of bars, restaurants, galleries, and chic boutiques, are on your doorstep.

Madrid has an eclectic ‘Old Town’, the Madrid de los Austrias district, made up of traditional baroque architecture, ancient squares and buzzy nightlife – the perfect spot to start your walking tour. From there, make your way west to El Retiro Park and the beautiful Palacio de Cristal at its centre.

A little further out – just an hour from the city – is the Puerto de Navacerrada Ski Resort where you’ll find pistes for all abilities. Try the Telégrafo route, which offers magnificent views of the Sierra de Guadarrama National Park.

“Madrid’s food is the most memorable of any city I’ve even visited,” says Callie. Freshly made churros dipped in a cup of thick, glossy hot chocolate – especially at the popular Chocolateria San Gines, open 24 hours a day – is a compulsory festive treat.

Elsewhere, Casa Lucio is a hidden gem. Fronted by Lucio's wife, chef Maribel, there's no menu (and no prices on the chalkboard), but Lucio and waiter Patrick will make suggestions. Try the tastum albarole (cured sheep cheese from Umbria) or pochas negras con morcilla (black beans with black sausage).

For a fun way to spend a lazy Sunday morning, the legendary El Rastro flea market, in Madrid’s La Latina neighbourhood, is worth a visit for its stash of vintage clothing and creations by local Spanish artisans.

Then, just 30 minutes from the city centre, you’ll find this season’s investment pieces with unmissable offers at Las Rozas Village – including inspired French fashion in the recently-opened Isabel Marant boutique.