Thomas J. Watson Research Center

Sarles' Tavern, also known as Granite House, was a historic inn and tavern building located at Millwood, Westchester County, New York. It was built between 1814 and 1817 and was constructed of locally quarried granite. It was a two-story, rectangular building with a low pitched gable roof in a restrained Greek Revival style. The property was sold in 1817 by David Crasto to William Sarles, who renamed the property Sarles Tavern. Sarles operated the property as a stagecoach stop for the route from White Plains to Somers until his death in 1853. After Sarles' death the building was run as a tavern by his sons until it was sold to the Merritt family, which ran it as an inn until the early 1900s. The property's name was then changed to Merritt's Corners.The building was demolished in 1993 after the interior was consumed by fire; The building was unusable.It was added to the National Register of Historic Places in 1979.

Millwood is a hamlet and census-designated place located in the town of New Castle, New York, United States in Westchester County. It was originally settled as Sarlesville. The area now known as Millwood appears on 19th century maps as Merritt's Corners (now the intersection of NY 100 and NY 120) and Rockdale Mills (close to what is now the Briarcliff Manor border). As of the 2000 census, the community had a population of 1,210. Miss America 1984, actress and singer Vanessa Williams grew up in Millwood, but lives in New Castle's other hamlet of Chappaqua.Sarles' Tavern, also known as Granite House, was added to the National Register of Historic Places in 1979.

The Isaac Young House is an historic wood frame house on Pinesbridge Road in New Castle, New York, United States. It was built about 1872 in the Second Empire style. Its owner, Isaac Young, was a descendant of early settlers in the area. He chose the Second Empire style, more commonly found in cities and villages than on farms, possibly as a way of demonstrating his affluence. The present structure appears to incorporate parts of a vernacular late 18th-century farmhouse, leaving several anomalies in the current house as a result. The house's position atop a low hill would have, in its time, given it a commanding view of the region, including the Hudson River and New York City's skyline. The Isaac Young House is the only Second Empire house from that era in New Castle. There have been several renovations and alterations, including the removal of its original Italianate central tower. The current owners restored it extensively after purchasing it from the Youngs. In 2004 the house and its barn were listed on the National Register of Historic Places.

Millwood was a railroad station on the New York and Putnam Railroad in the hamlet of Millwood in New Castle, New York. It was located on Station Road just south of the southeast corner of the west end of the NY 120/133 overlap. Originally built by the New York and Putnam Railroad in 1881, this later became the Putnam Division of the New York Central Railroad. The original station house was built in 1888 but burnt to the ground soon after. The station was replaced in 1910 when the old Briarcliff Manor station was moved by flat car to the current location. The Putnam Line ended passenger service in 1958; the line was abandoned and now serves as the North County Trailway rail trail. After the line's passenger use ended, the station variously served as a real estate office and fruit and vegetable market.The station, which had fallen into a state of disrepair, was demolished on May 9, 2012 after it was determined that it would be too costly to repair. According to demolition workers, several support beams on the inside of the building had fallen down, and several others had nearly been eaten through by insects. The station was identical to the Ardsley, Yorktown Heights, Baldwin Place, and two other stations on the line.

The Old Croton Dam is a historic dam located in Yorktown, Westchester County, New York, now lying submerged beneath the waters of the New Croton Reservoir. The dam was built on the Croton River between 1837 and 1842, and was the first substantial masonry dam in the United States. Construction was delayed by a January 1841 storm that washed away most of the dam, with heavy downstream damage and loss of life.

Teatown Lake Reservation is a nonprofit nature preserve and environmental education center in Westchester County, New York, U.S., located in the towns of Ossining, Yorktown, Cortlandt, and New Castle. The reservation includes an 1,000-acre (4.0 km2) nature preserve and education center, visited annually by around 25,000 people. Known by locals simply as "Teatown", the organization works to conserve biodiversity, teach ecology and promote nature-friendly living. Located in the Lower Hudson Valley's Hudson Highlands, Teatown Lake Reservation conserves open space, educates about the environment, sustaining the diversity of wildlife and plants.

The Williams–DuBois House is located at Grace Lane and Pinesbridge Road in New Castle, New York, United States. It was built by an early settler of the area during the Revolutionary War. In 1989 it was listed on the National Register of Historic Places.Originally built in the Georgian-influenced American Colonial style, it later acquired some Federal style decoration, particularly on the interior. The lunette windows on the second story may have been added later, after their use on a now-demolished local hotel. Despite later modifications, it is the only house from that era remaining in the town that has a gambrel roof. It remains a private residence.

The Carrie Chapman Catt House, also known as Juniper Ledge, is located on Ryder Road in the town of New Castle, New York, United States. It is an Arts and Crafts-style building from the early 20th century. In 2006 it was listed on the National Register of Historic Places; five years later it was designated a town landmark as well.While it is a fine example of its school of architecture, the house's primary historical value is that it was the home of suffragist Carrie Chapman Catt and her partner Mary Hay from 1919 to 1928. That period was the height of her activism; it began with the passage and ratification of the Nineteenth Amendment, which granted women the right to vote, and continued with her founding of the League of Women Voters and advocacy of women's suffrage in other countries. She found the house an ideal place to rest her "tired nerves" since the land was too steep to farm productively. However, later on she did start limited farming, including raising cattle and chickens, on the land, and made some significant modifications to the property. She also claimed to a group of guests during the early years of Prohibition that she had bought the land to prevent anyone from using its juniper berries to make gin.After nine years, she and Hay, who had never embraced the rural lifestyle, moved out. The land has been further subdivided but the house remains largely intact. It is still a private residence. Composer Carmino Ravosa, who learned of Catt's residence there while researching a musical, has worked to preserve it.

Turkey Mountain is a hill (despite its name) located in Yorktown Heights, New York. The hill is located on a land reserve and is currently maintained by the Yorktown Land Trust. It is approximately of 125 acres (0.51 km2) of land.

Greasestock was an American event held yearly in Yorktown Heights, New York. Exhibitors showcase a variety of alternative energy vehicles, as well as exhibits with a sustainable lifestyle theme. Although it is illegal in New York to power a vehicle with waste vegetable oil, authorities in New York have stated they had no problem with the festival and even participated in it.The event was founded in 2003 by individuals who shared an interest in vegetable powered vehicles. It is held on the grounds of Peter Pratt's Inn, a historic landmark. According to Jon Pratt, founder of the event, while the original event hosted only eight people interested in discussing alternatives to gas, each successive incarnation of the Greasestock celebration has drawn more and more visitors from all over the United States who are interested in cheaper gas, cleaner energy, and helping the environment.The green technologies demonstrated at the event include vegetable oil powered cars, biodiesel cars, solar powered cars, home heating alternatives, and organic farming exhibits. The event draws exhibitors from all over the United States, and included among the hundred or so vehicles on display is a vegetable powered garbage truck from Mamaroneck, New York, the first of its kind in New York.

New Castle is a town in Westchester County, New York, United States. The population was 18,311 in the 2020 United States census, an increase over 17,569 at the 2010 census. It includes the hamlets of Chappaqua and Millwood.

The New Croton Reservoir is a reservoir in Westchester County, New York, part of the New York City water supply system lying approximately 22 miles (35 km) north of New York City. It is the collecting point for water from all reservoirs in the Croton Watershed.