There are some cool pics of the set, along with some interesting tidbits about the set itself.
For example, in the movie the same set had to be redone to pass for years 1938, 1945, 1953, 1957, 1964, 1974, 1975, 1977, and 1985 (And you thought doing the three time periods for Back To The Future was impressive).
As for more on the movie, here's the synopsis from the website:
A complex, multi-layered mystery adventure, Watchmen is set in an alternate 1985 America in which costumed superheroes are part of the fabric of everyday society, and the “Doomsday Clock” – which charts the USA’s tension with the Soviet Union – is permanently set at five minutes to midnight. When one of his former colleagues is murdered, the washed up but no less determined masked vigilante Rorschach sets out to uncover a plot to kill and discredit all past and present superheroes. As he reconnects with his former crime-fighting legion – a ragtag group of retired superheroes, only one of whom has true powers – Rorschach glimpses a wide-ranging and disturbing conspiracy with links to their shared past and catastrophic consequences for the future. Their mission is to watch over humanity…but who is watching the watchmen?
The film based on the graphic novel is being directed by Zack Snyder (300) and produced by Lawrence Gordon (Die Hard), Lloyd Levin (United 93) and Deborah Snyder (300), with Herbert W. Gains serving as executive producer.
Playing the film’s core group of “masks,” the masked adventurers at the center of the story, are Malin Akerman (upcoming The Heartbreak Kid) as Laurie Juspeczyk, aka Silk Spectre; Billy Crudup (The Good Shepherd) as Jon Osterman, aka Dr. Manhattan; Matthew Goode (Match Point) as Adrian Veidt, aka Ozymandias; Jackie Earle Haley (Little Children) as Walter Kovacs, aka Rorschach; Jeffrey Dean Morgan (TV’s Grey’s Anatomy) as Edward Blake, aka the Comedian; and Patrick Wilson (Little Children) as Dan Dreiberg, aka Nite Owl.
Watchmen was originally published by DC comics as a 12-comic book series between 1986 and 1987, before subsequently being collected into a trade paperback. It is the only graphic novel to win the prestigious Hugo Award or to be named among Time magazine’s “100 Best English Language Novels from 1923 to the Present.”