Enter 'roundhouse' as a search term at
Library of Congress - American Memory - Built in America, and look at what you get as the first result!
The
Milwaukee Road roundhouse at Deer Lodge, MT!
There's also the C&S roundhouse at Denver, the B&O roundhouses at Martinsburg, WV, the Southern Spencer, NC shops, the CBQ roundhouse at Aurora, EBT at Rockhill, and many more, usually with B&W pictures (ranging all the way to full-size TIFF scans), sometimes including architectural plans, and color photos, too; all in various states of repair, some older pics showing them in their full glory in the 40s to others in the 70s or 80s showing them abandoned, or just their foundations.
