I happened to be passing through Holloway Road tube station this week and noticed the quaint, tiled ticket windows. No longer in use, they surprisingly survived a "refurbishment" in 2007-8. Not only are they tiled, they are rich shades of green. I returned with GT at the weekend. This has prompted a Green Page.
The station was constructed by the Great Northern, Piccadilly and Brompton Railway and was built with two lift shafts, but only one was ever used for lifts. The second shaft was the site of an experimental spiral escalator which was built by the American inventor of escalators, Jesse W. Reno. The experiment was not successful and was never used by the public. In the 1990s, remains of the escalator equipment were excavated from the base of the lift shaft and stored at the London Transport Museum Depot in Acton. From the platforms, a second exit no longer in use is visible and leads to the back of the used lift shaft. The station is adjacent to the site of the former Holloway and Caledonian Road railway station. Wikipedia