Covent Garden tube station

Covent Garden was the first tube station that the Second Doctor, Jamie and Victoria visited during the so-called "London Event" — an occasion when the London Underground was invaded by the Great Intelligence, (TV: The Web of Fear) ostensibly because of the Eleventh Doctor's suggestion. (TV: The Snowmen)

When they visited, the station was pitch dark, so it took some time for them to realise that they were in fact in a tube station.