Usonia Historic District

Sol Friedman House Toyhill, was built in Pleasantville, New York in 1948. This was the first of the three Frank Lloyd Wright homes built in the "Usonia Homes" development north of New York City. The Friedman House forms part of the post-war development of Wright's use of the circle, culminating in his Solomon R. Guggenheim Museum in Manhattan. The Sol Friedman house in Pleasantville, N.Y., is roofed with mushroom-like concrete slabs; the two intersecting closed circles of the actual dwelling are balanced at the end of a straight terrace parapet by the mushroom-shaped carport. This house was completed in 1949 with battered (sloped) walls of almost Richardsonian random ashlar masonry below a strip of metal-framed windows. Wright dubbed the house Toyhill because Sol Friedman was a retailer of books, records, and (in some stores) toys.

Edward Serlin House was completed in 1949, and is the second of three designs by Frank Lloyd Wright for Usonia, planned as a cooperative community starting in the late 1940s. This is now known as the Usonia Historic District and is located in Pleasantville, New York. The community was listed on the National Register of Historic Places in 2012. The home has three bedrooms, two bathrooms, and is on a five-foot square module, with a shed roof over the living room. Construction was supervised by former Wright apprentice, David Henken, with additions to the design made by Aaron L. Resnick.

Roland Reisley House was built in Pleasantville, New York in 1951. The third of the "Usonia Homes" (now known as the Usonia Historic District) designed by Frank Lloyd Wright. this is a building on a hillside with a masonry "core" and wood siding. Roland Reisley was 26 when he built his home. The entrance is dominated by a dramatic wood cantilevered carport, which leads to an impressive yet unpresumptuous low-slung house with cypress paneling and indigenous stone. The original house, built in 1951, had one bedroom, a study and a kitchen and a total of 1,800 square feet (170 m2). Wright returned five years later to design a 1,400-square-foot (130 m2) addition. Usonia Homes was listed on the National Register of Historic Places in 2012.

Witthoefft House is a historic home located at Armonk, Westchester County, New York. It was built in 1957, and is an International Style dwelling on a concrete slab foundation and stone covered concrete retaining walls. It features exposed structural steel, white glazed-brick walls, and full elevations of glass. The house is perched atop rock outcroppings in a semi-rural setting.It was added to the National Register of Historic Places in 2011.

The Louis Calder Center is Fordham University's biological field station. The Calder Center is a protected forest preserve located 30 miles (48 km) north of New York City in Armonk, New York, and is the only full-time ecological research field station in the New York metropolitan area.

The Whippoorwill Club is a private country club facility near Armonk, New York. In 2010 Golfweek magazine ranked the Whippoorwill golf course as the 73rd best classic course in the United States. The club is not just about golf. There is a swimming pool, tennis courts, paddle ball courts and golf simulators, as well as the traditional club house with first class dining facilities. The Club offers golf, tennis and house memberships.

Westchester County is located in the U.S. state of New York. It is the seventh most populous county in the State of New York and the most populous north of New York City. According to the 2020 United States Census, the county had a population of 1,004,456, its highest decennial count ever and an increase of 55,344 (5.8%) from the 949,113 counted in 2010. Located in the Hudson Valley, Westchester covers an area of 450 square miles (1,200 km2), consisting of six cities, 19 towns, and 23 villages. Established in 1683, Westchester was named after the city of Chester, England. The county seat is the city of White Plains, while the most populous municipality in the county is the city of Yonkers, with 211,569 residents per the 2020 U.S. Census. The annual per capita income for Westchester was $67,813 in 2011. The 2011 median household income of $77,006 was the fifth-highest in New York (after Nassau, Putnam, Suffolk, and Rockland counties) and the 47th highest in the United States. By 2021, the county's median household income had risen to $105,387. Westchester County ranks second in the state after New York County for median income per person, with a higher concentration of incomes in smaller households. Simultaneously, Westchester County had the highest property taxes of any county in the United States in 2013.Westchester County is one of the centrally located counties within the New York metropolitan area. The county is positioned with New York City, plus Nassau and Suffolk counties (on Long Island, across Long Island Sound), to its south; Putnam County to its north; Fairfield County, Connecticut, to its east; and Rockland County and Bergen County, New Jersey, across the Hudson River to the west. Westchester was the first suburban area of its scale in the world to develop, due mostly to the upper-middle-class development of entire communities in the late 19th century and the subsequent rapid population growth.Westchester County has numerous road and mass transit connections to New York City, and the county is home to the headquarters of large multinational corporations including IBM, Mastercard, PepsiCo, and Regeneron Pharmaceuticals. Westchester County high school students often feature prominently as winners of the International Science and Engineering Fair and similar STEM-based academic awards.

Thornwood is a hamlet (unincorporated community), census-designated place (CDP), and postal designation (with zip code 10594) in the town of Mount Pleasant in Westchester County, New York, United States. The population was 3,759 at the 2010 census.

The Battle of Young's House was a skirmish fought outside New York City between British and American forces on February 3, 1780 during the American Revolutionary War. A British force attacked and destroyed a Continental Army outpost in Westchester County, New York.

Temple Beth El of Northern Westchester is a Reform Jewish congregation in Chappaqua, New York. Founded in 1949, it is notable for its synagogue building, designed by Louis Kahn. Although Kahn designed other synagogues, this is the only one of his designs that was built.According to the National Trust for Historic Preservation, Kahn accepted the commission in 1966, and completed plans for the octagonal sanctuary six years later.

Thornwood station was a stop on the Metro-North Railroad's Harlem Line, serving the hamlet of Mount Pleasant, New York until its closure in 1984. During its existence, the station was one of the least used on the Harlem Line. Prior to its closure, it had only half the weekday service of the neighboring Hawthorne and Pleasantville stations, and was merely a flag stop for four trains on weekends.

Rehoboth is a historic former barn located on Aldridge Road in Chappaqua, New York, United States. It is a concrete structure that has been renovated into a house with some Gothic Revival decorative elements. In 1979 it was listed on the National Register of Historic Places.It was designed and built in the mid-19th century by newspaper editor and activist Horace Greeley as one of the agricultural experiments he dabbled in, testing whether concrete would make a good building material for farms. It was one of the first concrete structures in the country, and the first concrete barn. Greeley was so satisfied with the result he predicted that he would be remembered for it if nothing else.Two decades after Greeley's death, his daughter Gabrielle and her husband, the Rev. Frank Clendenin, pastor of a New York City Episcopal church, commissioned architect Ralph Adams Cram to remodel it into their house, which he named Rehoboth. They lived there for the rest of their lives, the remodeled house becoming one of the centers of Chappaqua's social life as the community completed its metamorphosis from country town to suburb. It has remained a private home since then.