There is a station like this on the Central Line in London called Museum, it used to serve the British Museum and you can still see the ghostly platforms from passing tube trains. There is something spooky about being underground in a place that was once so full of life. Even more so when the place is still visited every few seconds by the speeding modern metro trains.
I touched the counter of the ticket barrier that had been hollowed by the scoop of thousands of hands holding thousands of tickets. I smelt the dank air of the past and was glad to return to the hot sun of a Madrid day.