Danielle tells MailOnline Travel that this specific style of caboose is called an 'extended-vision' or 'wide-vision' caboose due to its cupola, which is a small windowed protrusion on the roof.

The service, along with its partner, the U.S. Department of Energy (DOE), is currently testing a new security caboose meant to ... the presence of evenly spaced vision ports at eye level, and ...

was built in 1916 as an outside braced boxcar and converted into a caboose circa 1940. It stands 14 feet tall, 10 feet wide and 45 feet long and sits on property leased from the city of Monterey ...