The Suffolk County Vanderbilt Museum - a unique combination of mansion, marine and natural history museum, planetarium and park - is dedicated to the education and enjoyment of the people of Long Island and beyond. This mission shall be achieved through the thoughtful preservation, interpretation and enhancement of the Eagle's Nest estate as an informal educational facility. Exhibition and program themes focus upon Long Island's Gold Coast Era and upon William K. Vanderbilt II's desire that his marine, natural history, and ethnographic collections promote appreciation and understanding of the marvelous diversity of life, other cultures, and scientific knowledge.

In 1973, growing interest in local history led to the organization of the Greenlawn-Centerport Historical Association. A permanent charter from the State of New York was received in October 1976. The GCHA is a non-profit membership organization with a mission to research, collect, record and preserve the history of the communities of Greenlawn and Centerport, Long Island, New York

The Cold Spring Harbor Whaling Museum collects, preserves, and exhibits objects and documents pertinent to whaling, especially the regional whaling history of Long Island, whale conservation, and the history of Cold Spring Harbor as a maritime port. The Museum serves a broad and diverse public audience.