He is best known for his work chronicling the decay and transformations of buildings, as well as his nature studies.[3] His most recent works (Shore Views, Squares from Nature, and Sea, Shore, Sky & Ice) focus on shifting scenes of nature. Whitman's earlier MASS MoCA: From Mill to Museum (2001), on the other hand, documents the renovation of a sprawling[4] electronics plant into the Massachusetts Museum of Contemporary Art, .[5][6] Similarly, Whitman's 2008 book, The Colonial Theatre: A Pittsfield Resurrection, showcases the transformation of the Miller Supply Company of Pittsfield, Massachusetts into a functional playhouse.[7][8]