The original St. Enoch Subway Station

Above ground, the original station building housed both a booking office and the headquarters of the original Glasgow District Subway Railway Company. This was  the Subway's most distinctive building - an ornate, Jacobean, late Victorian red sandstone structure; designed by James Miller in 1896. It still stands - it was carefully preserved during the modernisation of the Subway in 1977, even being jacked up in the air for a while, during reconstruction of the subsurface platforms.
The building was no longer used as a ticket office following the 1977-1980 modernisation; it became a travel information centre by SPT. The building became disused with the Travel Centre facilities being moved to the underground ticket hall in 2008. In December 2009, a  coffee shop was established in the building. It is now protected as a category A listed building

(Information from the Internet)