In 1921 Marshall Field III purchased 1,750 acres of Lloyd Neck to create one large estate. He named the land after its Matinecock Indian name, Caumsett, which means "place by a sharp rock." Field created a self-sufficient English-style estate as a combination country club, hunting preserve, and home, complete with its own water and electrical supply. When the estate was finished, it had facilities for every sport except golf.

The site offers tours and some educational services.

Following the outbreak of war between the United States and Great Britain in June 1812, Sackets Harbor became the center of American naval and military activity for the upper St. Lawrence Valley and Lake Ontario. In an attempt to destroy the American shipyard, a British-Canadian force launched an attack on May 29, 1813, while the majority of the American forces were attacking Fort George. In December 1814, the Treaty of Ghent officially ended the War of 1812, and the fleet was placed in storage. After the war the earthen fortifications were graded off and the battlefield reverted to farmland.

Today, the site offers tours, demonstrations, exhibits, and occasional living history events, as well as other educational and recreational programs.

The Clinton House was first built in 1765, and is notable for being actively used when Poughkeepsie was the capital of New York during the years from 1777 to 1783. Today, the home is open to the public as a historic house museum and has been restored to its state during the late 1700s.

The house offers guided tours. The website offers visitor information and a brief history of the home.

The system describes the historical significance of 18 New York areas: Albany, Buffalo, Harbor Park, Heights, Kingston, Mohawk Valley, North Shore, Ossining, RiverSpark, Rochester High Falls, Sackets Harbor, Saratoga Springs, Schenectady, Seneca Falls, Susquehanna, Syracuse, Western Erie Canal, and Whitehall.

The system offers visitor centers for the above heritage areas.

The Merchant's House Museum is New York City's only family home preserved intact, both the interior and exterior, from the 19th century. Built in 1832, this red-brick and white-marble late Federal and Greek Revival row house on East Fourth Street was home to a prosperous merchant family for almost 100 years (1835–1933). The façade, with its steeply pitched roof, dormer windows, marble door surround, and elaborate fan light recalls earlier Federal-style homes; while, inside, the formal Greek Revival parlors reflect the latest architectural fashion of the day. The Merchant's House is considered New York City's prime example of a Greek Revival home. Complete with the family's original furnishings and personal possessions, the house offers a rare and intimate glimpse of domestic life during the pivotal era of the 19th century when New York City was transformed from a colonial seaport into a thriving metropolis and the center of U.S. commerce. Three floors and eight period rooms display the possessions of the inhabitants—including their furnishings, clothing, and personal items. The costume collection includes 420 articles of clothing—primarily women’s dresses and their accompanying accessories, such as petticoats, collars, undersleeves, and chemisettes. The majority of the dresses range from 1840–1885, with two examples of 1830s dresses and an extremely rare dress ca. 1813-1815 that is in excellent condition, as well as a rare mid–19th–century corset. The 19th–century rear garden is also open for viewing.

The museum offers self-guided tours, mp3 download or cell phone audio tours, guided house tours on a variety of subjects, guided neighborhood tours, an introductory slide show, docents available to answer questions, an outreach slide show and lecture program, a traditional afternoon tea, period rooms, online exhibits, and the option of friending Gertrude Tredwell (one of the houses residents, 1840–1933) on My Space or Facebook.

The Cayuga Museum of History and Art presents the history and culture of the Auburn, New York area. The museum is located within the 1836 Willard-Case Mansion, with the permanent exhibit addressing the history of the Auburn Correctional Facility. The Case Research Lab preserves the site where the first commercially successful talking film technology was developed. The site includes the darkroom, chemistry lab, recording studio, exhibits on talking film ventures, recording equipment, and the first sound camera.

The museum offers exhibits, guided tours, and thematic slide presentations. Reservations are required for guided tours.

The Pruyn House is a circa 1830 Greek Revival and Federal-style home, in which Casparus Pruyn and his family lived. Pruyn was both a businessman, with strong ties to Dutch interests, and farmer. In addition to the home, the grounds offer a smokehouse, potting shed, reconstructed barn, 1910 schoolhouse, well house, woodshed and privy, and gardens.

The house offers period rooms and gardens.

The Livingston County Historical Society is dedicated to preserving and showcasing the history of Livingston County and the Geneseo area. The society owns and operates a local history museum, presenting a variety of exhibits on the history of the Geneseo area.

The museum offers exhibits on local history, including pieces of historic furniture and historic artifacts, and is one of the few remaining examples of cobblestone architecture in New York. The website offers visitor information and a brief history of the society.

The Society maintains a restored 1870s farm house as the Greece Museum, featuring exhibits of local history. Visitors can bridge the years by stepping into the new museum wing and wandering through the gallery of historical exhibits. They can take a look at the town's first fire wagon, imagine our ancestors harvesting ice from a lakeside pond, contemplate transportation before the automobile, or study the Native American encampment on Long Pond.

The society offers occasional recreational and educational events; the museum offers exhibits.