Browse the El Rastro flea market
Every Sunday morning, El Rastro takes over the rambling streets south of Plaza de Cascorro, with thousands of shoppers coming to try on clothes, flick through old books or rummage for antique jewellery. The sheer size of the market makes it worth having a look, even if you don’t want to buy anything.
See a piece of ancient Egypt
Madrid has plenty of old buildings, but in terms of sheer antiquity there’s nothing quite like the Temple of Debod – an ancient Egyptian complex built near Aswan more than 2,000 years ago. The enormous stone blocks were dismantled and sent to Madrid in the 1960s (as a thank you for Spain’s help in protecting other Egyptian temples from flooding) then reassembled in the city’s Parque del Oeste.
Look skywards at the Planetario de Madrid
It’s always free to look around Madrid’s planetarium, which has audio-visual exhibitions looking at all aspects of space and its exploration. There’s a hands-on area for kids, and a domed projection room (which costs extra) that guides visitors through the night sky.
Get lost in Madrid’s barrios
Take a short walk away from Puerta del Sol and you’ll discover some of Madrid’s most colourful barrios (wards). Try multicultural Lavapiés, where shisha bars and Indian restaurants line the graffiti-daubed streets, or hipster-packed Malasaña, known for its nightclubs and vintage clothing shops.
Party on the streets
Street parties and festivals are an important part of Madrid’s social calendar. One of the wildest events is February’s Carnaval, a six-day festival of music, theatre and dance that opens with a fantastical procession of floats and costume-clad performers.
Visit the Royal Palace
Time it right and you can visit the Spanish king’s official residence for free. Unlike his predecessors, Juan Carlos I doesn’t actually live at the Royal Palace, a treasure trove of art and antiquities inspired by the Louvre in Paris, but it is still used for state events. Admission is free for EU residents on Wednesday and Thursday afternoons.
See flamenco for free
Okay, so you’ll need to buy a drink, but the late-night restaurant Clan gives you the chance to see authentic flamenco performances for free. The music starts sometime after midnight on Fridays and Saturdays, and dancing carries on until 3am.
Take a free walking tour of Madrid
You might need to tip your guide, but the three and half hour walking tours offered by Sandeman’s New Europe are officially free. Tours start outside the tourist office on Plaza Mayor everyday (at 11am and 1pm), taking in popular sights like the Royal Palace and Plaza de la Villa.