The Natural History Museum, housed in a modern spacious building, is situated in the Napier Museum
and Zoo complex. The museum has a varied and rich collection of minerals and books presented by General Cullen in 1885. The museum has separate galleries for mammals, birds, lower vertebrates, invertebrates, separate room for index collections, skeleton gallery, an ethnographic collection, and a laboratory. There is also an outdoor exhibit of fossil tree trunks near the entrance of the museum. The art collection covers aspects of Kerala
's rich heritage in sculptures of stone, wood and metal. An interesting replica of Tharawad
is also present in the museum.