The “Eizo: Pin-up Calendar 2010” is really different. This pin-up calendar offers you more than the usual nude: this medical supply company opted to show X-rays of the models. (Technically safe for work, though these are x-rays of nudes. While you don't actually see any flesh, the suggestion might be enough to make some offices unhappy.)
In the early part of the 20th century, French-Jewish capitalist Albert Kahn set about to collect a photographic record of the world. The images were held in an 'Archive of the Planet'. Before the 1929 stock market crash, he was able to amass a collection of 180,000 metres of b/w film and more than 72,000 autochrome plates, the first industrial process for true colour photography. Some of the images can be seen here, and they are stunning.