A music school is an institution where music is taught to a high standard, sometimes with other standard subjects taught as secondary (such as at the Yehudi Menuhin School.) Often music schools are dedicated to the perfection of an instrument or voice, but musical theory can also be taught.
... stations, all of which were at the far end of the Metropolitan Line, and stretch the definition of "tube station" a little:
Waddesdon tube station[?]
Quainton Road ...