Pablo M.
Yelp
Small private museum in the middle of Madrid, with an incredible art collection:
Pictures by Constable, Cranach, Zuñiga, Goya, El Greco, Murillo, Madrazo, Zurbarán, Velázquez, El Bosco...
It also accounts with armours, weapons, sculptures, yewels, furnitures, tapestries...
Incredible and mostly unknown! After visiting it one can also have lunch in one of the many good restaurants around it.