Plan a visit

	Mansion	Where	What is open	Official site
	Castle Gould Sands Point Preserve visitor center, Great Hall event space, sound stage and offices	Sands Point, Nassau County 127 Middle Neck Road, Sands Point, NY 11050	Open to visitors on a schedule Preserve open Wednesday through Sunday (fall 2026: 9 am to 6 pm through November 1; winter: 9 am to 5 pm from November 4 to March 28), closed Monday and Tuesday; last entry 30 minutes before closing. Admission $15 per car, $4 per walk-in visitor, free for Conservancy members. The Welcome Center and Gift Shop in Castle Gould are open Wednesday through Sunday, 11 am to 6 pm. Castle Gould itself is not toured; Hempstead House and Falaise are open on scheduled guided tours.	sandspointpreserveconservancy.org
	Caumsett State park preserve; estate buildings used for park operations, education, and equestrian programs	Lloyd Harbor (Lloyd Neck), Suffolk County 25 Lloyd Harbor Road, Huntington, NY 11743 (park entrance)	Open to visitors on a schedule The park is open sunrise to sunset, seven days a week, all year, with a vehicle fee of $8 collected on weekends and holidays in spring and fall and daily in summer. Walking, biking, cross-country skiing, fishing, and trailered-in horseback riding are allowed. The main house interior is not on a regular public schedule.	parks.ny.gov
	Clayton Nassau County Museum of Art	Roslyn Harbor, Nassau County One Museum Drive, Roslyn Harbor, NY 11576	Open to visitors on a schedule The museum in the mansion is open Tuesday to Sunday, 11 a.m. to 4:45 p.m., last entry 4:15 p.m., closed Mondays. The arboretum and sculpture garden are open daily from 9 a.m. to dusk.	nassaumuseum.org
	Coe Hall Historic house museum within Planting Fields Arboretum State Historic Park	Upper Brookville, Nassau County 1395 Planting Fields Road, Oyster Bay, NY 11771	Open to visitors on a schedule The park is open daily (9 a.m. to 5 p.m. per the Planting Fields Foundation; 9 a.m. to 4:30 p.m. per NY State Parks), with an $8 vehicle fee in season. The Main House visitor center is open Friday to Sunday, 11 a.m. to 4 p.m., with self-guided tours at 1, 2, and 3 p.m. and guided tours at 11 a.m. and noon through November.	plantingfields.org
	Coindre Hall Suffolk County park; mansion used for weddings and events and for monthly public tours	Huntington, Suffolk County 101 Browns Road, Huntington, NY 11743	Open to visitors on a schedule The grounds are a county park. Splashes of Hope gives free public tours of the mansion on the last Saturday of each month at 11 a.m.; reserve by calling 631-424-8230. Events are booked through the caterer Lessing's.	suffolkcountyny.gov
	Eagle’s Nest Museum of the house, natural history and cultural collections, with a planetarium and observatory	Centerport, Suffolk County 180 Little Neck Road, Centerport, NY 11721	Open to visitors on a schedule Open Tuesday and Friday from 12 p.m. and Saturday and Sunday from 11 a.m., closing at 5 p.m. with last admission at 4 p.m. Mansion tours of the living quarters are sold first come, first served at Admissions, with 12 guests per tour; private tours by advance request.	vanderbiltmuseum.org
	Falaise House museum within Sands Point Preserve	Sands Point, Nassau County Sands Point Preserve, 127 Middle Neck Road, Sands Point, NY 11050	Open for events and tours only Guided tours June through October: Fridays at 12, 1, 2, and 3 p.m., and Saturdays and Sundays at 12 and 2 p.m. Tickets are $15 per person, sold only on the day at the Castle Gould Welcome Center (opens 11 a.m., Wednesday to Sunday). Ages 12 and up; no photography. Preserve entry is $15 per car for non-members.	sandspointpreserveconservancy.org
	Hempstead House Concert, lecture, event and film venue within Sands Point Preserve; scheduled guided tours	Sands Point, Nassau County 127 Middle Neck Road, Sands Point, NY 11050	Open for events and tours only The preserve's trails, garden and playground are open Wednesday through Sunday for a per-car or walk-in fee. Falaise and Hempstead House are open only during scheduled guided tours, which are arranged through the Gate House at 516-571-7901.	sandspointpreserveconservancy.org
	Oheka Castle Hotel, restaurant, and wedding and event venue; mansion tours by reservation	Cold Spring Hills, Suffolk County 135 West Gate Drive, Huntington, NY 11743	Open to visitors on a schedule Docent-led mansion tours by reservation, starting at 11 a.m. daily, with added winter tours; book through the official site or call 631-659-1400. Overnight guests and diners at the OHK Bar and Restaurant also have access. Confirm before visiting because of the pending auction.	oheka.com
	Old Westbury Gardens House museum and public gardens	Old Westbury, Nassau County 71 Old Westbury Road, Old Westbury, NY 11568	Grounds open; the house is not The 2026 season runs April 1 to October 31. The grounds are open daily except Tuesday, 10 a.m. to 6 p.m., with last garden admission at 4 p.m. for non-members. Tickets include Westbury House and must be bought in advance online (members and library pass holders excepted). General admission is $22.	oldwestburygardens.org
	The Manor (Glen Cove Mansion) Hotel, conference center and event venue (The Mansion at Glen Cove)	Glen Cove, Nassau County 200 Dosoris Lane, Glen Cove, NY 11542	Open to visitors on a schedule The house operates as a hotel and event venue, so the interior can be seen by booking a stay, dining or attending an event. No public history tour schedule was found in this research.	themansionatglencove.com
	Welwyn Holocaust museum and education center; county nature preserve	Glen Cove, Nassau County 100 Crescent Beach Road, Glen Cove, NY 11542	Open to visitors on a schedule The museum is open Monday through Friday 10 am to 4:30 pm and Saturday and Sunday noon to 4 pm, with an admission fee; group tours are booked in advance. The preserve's four marked nature trails are open to the public.	hmtcli.org
	Wiley Hall (Bendel and Chrysler estate) Main administration building of the U.S. Merchant Marine Academy	Kings Point, Nassau County U.S. Merchant Marine Academy, 300 Steamboat Road, Kings Point, NY 11024	Open to visitors on a schedule The Academy says its grounds, museum and Navy Exchange are open to the general public Monday to Friday, 8:00 a.m. to 4:30 p.m., except federal holidays and the summer and winter leave periods. Check the Academic Calendar and call 516-726-5800 to confirm the operating status before coming. A campus map is available at the security gate. Wiley Hall is an office building.	usmma.edu

Historic homes nearby

Older than the Gold Coast era, and worth adding to the same day.

	Home	Where	What is open	Official site
	Cedarmere Nassau County historic site; first floor shown by tour, upper floors leased to nonprofit offices	Roslyn Harbor, Nassau County 225 Bryant Avenue, Roslyn Harbor, NY 11576	Open for events and tours only Grounds open dawn to dusk year-round. The Friends of Cedarmere say the house is open only by guided tour on Thursdays at 2 pm and 3 pm, first floor only; the mill is closed for interior restoration. Nassau County's museum listing says the buildings are under renovation, so confirm before visiting (Friends: 516-544-3944).	nassaucountyny.gov
	Sagamore Hill National Historic Site and house museum	Cove Neck, Nassau County 20 Sagamore Hill Road, Oyster Bay, NY 11771	Open for events and tours only Grounds open daily from sunrise to 30 minutes after sunset, free. The Roosevelt Home is seen only on a guided tour of about 45 minutes, Thursday through Sunday, reserved in advance at Recreation.gov or (877) 444-6777; adult tickets $15. Old Orchard Museum open Thursday 1:00 to 4:30 pm and Friday through Sunday 12:00 to 4:30 pm. Closed Thanksgiving, December 25 and January 1.	nps.gov
	Westbrook (Bayard Cutting Arboretum) Manor House of Bayard Cutting Arboretum State Park (tours, exhibits, cafe, park office)	Great River, Suffolk County 440 Montauk Highway, Great River, NY 11739	Open to visitors on a schedule Grounds open Tuesday through Sunday, 9 am to 5 pm in summer hours and 9 am to 4 pm in winter hours; closed Mondays except summer holidays. Vehicle use fee $8 per car in season. Manor House guided tours (first and second floors, about 60 to 75 minutes) are generally Thursday through Sunday at 11 am, $15 per person, booked in advance online; NY State Parks lists $7 for children under 12 and says the Manor House is closed in February.	bayardcuttingarboretum.com

Beyond the Gold Coast

	House	Where	What is open	Official site
	Montauk Manor Condominium resort hotel	Montauk, Suffolk County 236 Edgemere Street, Montauk, NY 11954	Open to visitors on a schedule The building is a resort hotel. Visitors can book a room, and the hotel has a restaurant and event spaces.	montaukmanor.com

Hours, prices and tour schedules change with the season; the official site is always right and this page is not. Links on this page are checked every day.

Where they are