AddressCalle de Santa Isabel, 52, 28012 Madrid, Spain
Phone+34 917 74 10 00
The Reina Sofia is Madrid's world-famous modern art gallery - and it has free entry for a limited time every day. That means you can see many works by Salvador Dali and Pablo Picasso - including the latter's masterpiece, the Guernica - completely free.
When is it free? Monday, Wednesday, Thursday, Friday, Saturday 7 p.m. to 9 p.m., Sundays 1:30 p.m. to 7 p.m. The museum is closed on Tuesdays.
Museo del Prado
AddressPaseo del Prado, s/n, 28014 Madrid, Spain
Phone+34 913 30 28 00
Officially Spain's most popular tourist sight and free seven days a week! The Museo del Prado is Spain's premier art gallery, housing the finest works of art Spain has ever produced.
When is it free? Monday to Saturday 6 p.m. to 8 p.m. and Sundays and holidays from 5 p.m. to 7 p.m.
Address28005 Madrid, Spain
The royal residence, just five minutes walk from Plaza Mayor.
When is it free? Wednesdays.
AddressPaseo del Prado, 8, 28014 Madrid, Spain
Phone+34 917 91 13 70
The third art museum in Madrid's 'golden triangle', the Museo de Thyssen-Bornemisza has the best private collection of classic and modern art in Spain.
When is it free? Mondays between 12noon and 4 p.m.
AddressCalle la Coruña, 18, 28020 Madrid, Spain
Phone+34 915 89 42 19
The Museo Tiflológico is Madrid's Blind Museum, maintained by ONCE, the Spanish blind association. Not so much about the blind as for them - which means lots of touchy-feely exhibits that anyone can enjoy. A bit different from the average museum.
When is it free? Always!
AddressPlaza de Chamberí, s/n, 28010 Madrid, Spain
Phone+34 902 44 44 03
The old Chamberi metro station was closed for many years, gathering dust (one hell of a lot of dust) under the streets of Madrid. But now it has reopened about a museum showing the history of Madrid's metro system. One for train fans and anyone interested in a quirky side to Madrid's history.
When is it free? Every day (apart from Mondays, when it's closed).
AddressCalle Conde Duque, 11, 28015 Madrid, Spain
Phone+34 913 18 44 50
Former barracks that now houses a number of interesting sights. The main attraction is the contemporary art museum, but there is also the Conde Duque, the city archive, libraries of history, music and newspapers and the artisan printing press.
Madrid's Museo Taurino (Bullfighting Museum)
AddressCalle de Alcalá, 237, 28028 Madrid, Spain
Phone+34 912 76 12 87
If you can't get to see a live bullfight in Spain, at least check out the bullfighting museum, which explains the history of the Spanish pastime and features some pretty gory artifacts - including bulls' heads and bloodstained costumes from matadors that have died fighting.
When is it free? Always.
Read more about Bullfighting in Spain.
An open-air abstract art museum that makes the best use of the dead space under a bypass. Artists featured here include Joan Miro and Eduardo Chillida.
When is it free? Always
AddressPlaza de la Independencia, 7, 28001 Madrid, Spain
Phone+34 914 00 87 40
The Retiro is Madrid's grand park, slap-bang in the middle of the city. With a lake, trees, flower gardens, chapel ruins and the Palacio de Cristal, it makes a perfect (and close) retreat from the hustle of Madrid's city life.
When is it free? Always!