Here's this week's puzzle: Westboro Rail Yard
"The West Lebanon rail yard was the western terminus of the Northern Railroad. It was initially equipped with a 130’ completely circular stone roundhouse with a stone cupola and stone machine shop. During the Boston & Maine’s operation, the stone roundhouse was removed and replaced by a new, brick building in 1890. About 1929 the B & M erected a third roundhouse which was later expanded and then partially removed as needs changed. At its peak in the early 20th century the yard also included a machine shop, sand house, heating plant, freight houses, section house, bunk house, tenements, garage, fan room, shanty and storehouse."
(From: Northern Railroad Survey)
Historic Photo of the Westboro Yard
A similar view from Google Earth
Daniel Webster's Speech at the ribbon cutting
Wikipedia article on the Northern Railroad
Cameron Cross
The Curioustorian