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Museums & Historic Homes

Nassau County operates numerous museums and plays host to others by providing the property and physical facilities as well as other services. Museums directly run by the Nassau County Parks, Recreation and Museums Department are denoted by an asterisk (*). These museums provide a range of artistic and educational experiences for the public. Click on a museum name below for more information and links to dedicated museum Websites. In addition, the County manages several historic homes that do not operate as separate museums, some of which are listed here.

North Shore

Cedarmere includes a small formal garden overlooking Roslyn Harbor.

Roslyn Harbor, Bryant Avenue (just north of Northern Boulevard)

Grounds are open to the public

dawn to dusk.

Buildings are under renovation.

Cedarmere, the historic property of prominent 19th-century poet, newspaper editor and civic leader William Cullen Bryant, includes the Bryant home and several other structures on a beautiful 7-acre property overlooking Roslyn Harbor. Visitors can view the exhibits in the house and stroll on the property, which includes a Gothic mill, a pond spanned by a rustic stone bridge and a small formal garden.


NEWS BRIEF: Nassau County, in partnership with the Friends of Cedarmere, Inc. and Roslyn Landmark Society, is working to restore buildings on the estate.


Chelsea Mansion*

East Norwich, 25A west of Jericho-Oyster Bay Road, on Muttontown Lane (south side of 25A)
On Site Staff:Yes


Located on the 550-acre Muttontown Preserve, Chelsea is a 40–room mansion listed on the National Register of Historic Places in 1979. The home was built by Mr. and Mrs. Benjamin Moore in 1924 and is an outstanding example of the design ideas prevalent during the latter part of Long Island’s Gold Coast Era. A blend of French, English and Chinese influences, the mansion provides a sense of mood, elegance and charm, while achieving well-proportioned, livable interior spaces.

NEWS BRIEF: Chelsea is now open for weddings, private parties or corporate retreats. For more information, click here.




Flower Hill, 200 Port Washington Boulevard

On Site Staff:Yes

The 4-acre Elderfields property has several buildings, including a main house that incorporates the original 17th-century home, one of the oldest structures on Long Island. There are also two carriage sheds and a walled garden. The property was left to Nassau County in 1996 by Henry deV. Williams and is being developed as an arts center with studios, a classroom and gallery, including a museum room displaying antique Long Island decorative arts. The Art Guild of Port Washington maintains space within the building, offering studio space, art classes and a regular schedule of art shows; grounds are open daily.


Sands Point, 127 Middleneck Road

On Site Staff:Yes

One of the few mansions left from Long Island's Gold Coast Era, Falaise was built on a bluff above the Long Island Sound in 1923 for Harry F. Guggenheim and his wife, Caroline. The home is located on the 216-acre Sands Point Preserve. The architecture of the mansion is French eclectic, based a 13th-century Norman manor house. Exterior features include an enclosed cobblestone courtyard, thickly mortared brick walls, a steeply pitched roof of heavy tile and a round tower. Inside, a Medieval atmosphere pervades, with arches, thick wood beams, textured plastered walls and carved stone materials.

The shoreline along the Garvies Point Museum and Preserve.

Garvies Point Museum & Preserve*
Glen Cove, Barry Drive
On Site Staff:Yes

A magnificent 62-acre site set along Hempstead Harbor, Garvies Point includes permanent exhibits, educational programs devoted to regional geology and Native-American archaeology.




Sands Point, 127 Middleneck Road

On Site Staff:Yes

A massive Tudor-style mansion located on the Sands Point Preserve, Hempstead House is a living reminder of the grandiosity of Long Island's Gold Coast Era. The 40-room mansion was completed in 1912 for Howard Gould, son the 19th-century railroad tycoon and financier Jay Gould. The structure is 225 feet long and 125 feet wide, with an 80-foot tower; it is built of granite and Indiana limestone. At a cost of more than $1 million, it was one of the most opulent homes on Long Island at that time. Gould rarely spent time at the mansion, however, and sold the estate to Daniel Guggenheim in 1917. The exterior of Hempstead House can be viewed, but the home itself is opened only occasionally for private events. The nearby 100,000-square-foot stable, Castlegould, was completed in 1904 in the style of Ireland's Kilkenny Castle.



Holocaust Memorial & Educational Center

Glen Cove, 100 Crescent Beach Road
On Site Staff:Yes

Located on the grounds of Nassau County’s Welwyn Preserve, the Holocaust Memorial & Educational Center offers exhibits and other educational programs designed to further understanding about and remembrance of the Holocaust.

Jericho Preserve & Malcolm House*

Jericho, 5 Old Jericho Turnpike (just south of Route 106)

On Site Staff:No

Phone: 516-433-7970 (Cornell Cooperattive Extension)

The 21-acre Jericho Preserve includes several original buildings from the Long Island Quaker settlement of Jericho, the most significant of which is the Malcolm House. The oldest part of the Malcolm House dates to 1757, with the main house having been added in 1804. The noted Quaker preacher Elias Hicks lived on the preserve and is buried in its cemetery grounds. The preserve itself is split into two parcels on either side of Old Jericho Turnpike and includes the Ketchum House and several cottages. The home is closed to the public; grounds are open daily. The preserve is the new home of the Cornell University Cooperative Extension of Nassau County.


Outdoor sculptures are on display throughout the grounds of the Nassau County Museum of Art.

Nassau County Museum of Art
Roslyn Harbor, One Museum Drive
On Site Staff:Yes

Called “the best kept secret” in Nassau County, this beautiful museum is located on 145 acres and occupies the former estate of the Frick family, above Roslyn Harbor. In addition to permanent and changing exhibits and educational programs, the museum offers magnificent grounds with outdoor sculptures and formal gardens.

Roslyn Grist Mill*

Roslyn, 1384 Old Northern Boulevard
On Site Staff:N/A

The Roslyn Grist Mill dates to between 1715 and 1745 and is one of the few remaining Dutch-framed Colonial commercial structures in the U.S. The property remained a working mill until the early 20th century, when it was converted to a teahouse and museum that remained in business until 1975. The following year, Nassau County acquired the mill, which is closed to the public.



Saddle Rock Grist Mill*

Saddle Rock, Grist Mill Lane
On Site Staff:No

Constructed around 1700 and restored to its mid-19th-century appearance, the Saddle Rock Grist Mill is one of the few remaining tidal mills left in the country and serves as a reminder of the importance that these mills once played in the economic life of Long Island. The mill, which was used to grind grain and corn, overlooks Little Neck Bay. The Saddle Rock Grist Mill remained in the private hands of the original owners and their families until 1950 when the Eldridge estate was sold to a developer. It was left by a descendant of the property owners (the Udalls) to the Nassau County Historical Society and was subsequently given to the County in 1955.

Science Museum of Long Island
Manhasset, 1526 North Plandome Road
On Site Staff:Yes

Located on the county’s Leeds Pond Preserve, the Science Museum is a nonprofit organization devoted to teaching children about the range of sciences through a variety of programs. As part of its educational efforts, the museum employs the beautiful 35-acre preserve, which overlooks Manhasset Bay and includes nature trails traversing a wooded valley with majestic tulip and oak trees.

The African American Museum offers a range of cultural events.

Central Nassau

African American Museum
Hempstead, 110 North Franklin Street
On Site Staff:Yes

This 6,000-square-foot museum, centrally located in Hempstead, offers a permanent exhibit and a rotating series of exhibits showcasing local and national African-American artists.


Cradle of Aviation Museum
Garden City, 1 Davis Avenue (across from Mitchel Athletic Complex)
On Site Staff:Yes

The Cradle of Aviation is a large, modern and beautiful museum dedicated to celebrating the history of Long Island’s contributions to American aviation. In addition to permanent and changing exhibits, the museum incorporates educational programs and an Imax theater.

Long Island Children’s Museum
Garden City, 11 Davis Avenue (across from Mitchel Athletic Complex)
On Site Staff:Yes

LICM is a hands-on museum for kids and their parents. The 40,000-square-foot Long Island Children’s Museum provides children and families with a wonderfully nurturing environment in which to enjoy hands-on exhibits; art, music and science workshops; and family-focused concerts and films. Click here for the Long Island Children's Museum Website.

The Firefighter's Museum & Education Center is located inside the Aviation Museum.

Nassau County Firefighters Museum & Education Center

Garden City, 1 Davis Avenue (across from Mitchell Athletic Complex)

Hours (fall - spring): Tuesday - Sunday,

10 a.m. – 5 p.m.; Mondays that fall on holidays, 10 a.m. – 5 p.m.

Summer Hours: Monday - Sunday,

10 a.m. - 5 p.m.

Admission: $3.50 (children) - $4 (adults).

Click here for Google map


This new 5,000-square-foot museum within the Cradle of Aviation Museum emphasizes fire-safety education through a series of exhibits, hand's-on activities and live demonstrations. Children learn how 911 calls get routed, for example, and how firefighters position themselves to battle blazes. Combining history and education, the Center features interactive displays that allow the visitor to touch, feel and smell the signs of a fire. Historical exhibits trace the evolution of fire boxes and firefighting apparatus. Click here for Firefighters Museum Website.


Old Bethpage Village Restoration*
Old Bethpage, 1303 Round Swamp Road
On Site Staff:Yes

Old Bethpage Village Restoration is a popular destination for school groups and families.

Old Bethpage Village provides visitors with a unique and wonderful opportunity to step back in time and experience life in a recreated mid-19th-century American village. The 209-acre village includes an assortment of homes, farms and businesses. Each fall, the village hosts the Long Island Fair, a traditional county agricultural fair that draws tens of thousands of visitors.


South Shore

Wantagh Museum

Wantagh, 1700 Wantagh Avenue, across from Emeric Avenue
On Site Staff:No

This unique museum offers a faithfully restored early-20th-century Long Island Railroad station and parlor car, along with Wantagh’s original post office. The museum is open occasionally from mid April through mid November (the facility is staffed by volunteers, so hours are subject to change); admission is free.


Tackapausha Museum*
Seaford, Washington Avenue between Merrick Road and Sunrise Highway
On Site Staff:Yes

The Tackapausha Museum offers a window into the varied natural habitats of Long Island, including plants and wildlife in different seasons. A popular exhibit features live animals in a reversed day-night cycle; the museum also provides educational programs.