I was always fascinated by the Gertrude Street/Nicholson Street building and knew it must have had something to do with cable trams, but I never realised the purpose of the North Melbourne winding house which is also mentioned on the website, although I'm very familiar with the building. And I was very interested to read the building on the corner of Victoria Parade and Brunswick Street was originally a winding house, this (pdf) is the minutes from a VTAC hearing on an application to get heritage status on the building, and details how the facade was significantly altered in the 1930s but internally it retains much of the fabric of a winding house.