It is these small little known museums which really make Madrid a great city to visit. It is off the tourist trail but is still really worth seeing especially as it is one of the musuems in Madrid which has free entry all of the time. The friendly and enthusiastic staff will happily give a guided tour (in Spanish) of this museum which is set in the abandoned station of Chamberí which is in exactly the same state as it was left in when the station closed forever in 1966. A video explains
(in Spanish only) the entire history of Madrid's metro network. The only thing which reminds you that this time capsule is set in modern Madrid are the modern metro trains which thunder through the abandoned station (a safety barrier along one of the platforms prevents you falling from onto the tracks as you admire the untouched 1920s posters adorning the walls).
This abandoned station is so worth seeing so visit it!
C/Luchana
Nearest metro station - Bilbao
Open Friday, Saturday and Sunday only
Google map: bit.ly/Rf7Sfg
Is this your business?