Stunning production design

Two things I adore about this movie...that living Goddess Diana Rigg...(whom the film tries to strip down to her underwear whenever possible)
...and the stunning production design....almost rivaling the work of Ken Adam.
Specifically....the Bureau's meeting room, Phillipe Noreit's fabulous domed bordello, the German beer hall, the palatial Venice rooms, the Zeppelin interiors.....makes the whole film come off like a wonderful little jewel box of a movie.....and that damned catchy little song that almost 45 years later, I still can't get out of my head and still warble in the shower. (Okay, that makes three things...)