John Rabe

Anna Sklar, author of "Green Acres: An Intimate History of the Los Angeles Sewers." She's standing in the North Outfall sewer, a huge line that runs under the Fox Hills Mall.

Back in April of 2008, Anna Sklar, the author of "Brown Acres, an Intimate History of the Los Angeles Sewers," took Off-Ramp host John Rabe underground into the longest sewer line in the country. Here's the three-part interview from the Off-Ramp archives.