Inside one of the country's weirdest office spaces — an old mine, located 20 stories under the rolling Pennsylvania countryside — federal employees do one of the government's most old-fashioned jobs: processing the retirement paperwork of other federal employees. And they do it by hand, mostly on paper, retrieving records from any of the 28,000 file cabinets and passing them from desk to desk, from cavern to cavern. The process works as slowly now as it did in 1977. Read related article.

Sources: Current and former employees of Office of Personnel Management | By Todd Lindeman and David Fahrenthold