Considering the Palacio De Miraflores in Madrid?
A VT member wrote the following comment about visiting Madrid:
One of the best subway systems in th world by midnight_mike
I have been in London, Paris, New York and many other major cities. Of all of them, Madrid has the best subway system. The subway system is extensive and efficent. In some cities a change of trains will require you to wait up to 10 minutes for the next train. But in Madrid, your next train comes in a minute or two. Even if you have to make three connections, it will not take long to get to your destination.