Daily Mail Logo Daily Mail | Slide 1 of 15: A new exhibit at the New York Transit Museum in Brooklyn showcases an incredible collection of photos from the early 1900s that document the city's underground railroad system under construction. The images were captured by brothers Pierre and Graville Pullis who were hired by the construction company to document the colossal undertaking which began in 1900. In addition to capturing the back-breaking work performed under the city's torn up streets, the extensive cache of pictures highlight the unique architectural and historical changes that were happening simultaneously above ground between 1900 and 1940. Click through to see a collection of the photos... < PREVIOUS SLIDE SLIDE 1 of 15 NEXT SLIDE >

A new exhibit at the New York Transit Museum in Brooklyn showcases an incredible collection of photos from the early 1900s that document the city's underground railroad system under construction. The images were captured by brothers Pierre and Graville Pullis who were hired by the construction company to document the colossal undertaking which began in 1900. In addition to capturing the back-breaking work performed under the city's torn up streets, the extensive cache of pictures highlight the unique architectural and historical changes that were happening simultaneously above ground between 1900 and 1940. Click through to see a collection of the photos...

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