--- title: Extravagant Long Island Mansions that are Worth a Visit description: If you want to see how truly magnificent the real estate in our area can be, then you have to pay a visit to these historic, humongous Long Island mansions. image: https://blog.sdnyrealty.com/hubfs/Blog_Images/Long%20Island%20mansions.jpg --- - [Pay Rent](https://sdnyrealty.com/pay-rent/) - [Forms](https://sdnyrealty.com/forms/) -   [![S&D Commercial Real Estate Agency](https://blog.sdnyrealty.com/hs-fs/hubfs/S__D_Real_Estate_January2019/images/sd-original-logo_300px.png?width=300&height=194&name=sd-original-logo_300px.png "S&D Commercial Real Estate Agency")](https://sdnyrealty.com/) - [About](https://sdnyrealty.com/long-island-commercial-real-estate-firm/) - [Agents](https://sdnyrealty.com/long-island-real-estate-agents/) - [Listings](https://sdnyrealty.com/property-listings/) - [Property Management](https://sdnyrealty.com/property-management-company/) - [Resources](https://sdnyrealty.com/real-estate-resources/) - [Neighborhood Guide](https://sdnyrealty.com/neighborhood-guide/) - [Long Island](https://sdnyrealty.com/long-island-commercial-real-estate/) - [Nassau County](https://sdnyrealty.com/nassau-county-commercial-real-estate/) - [Bethpage](https://sdnyrealty.com/bethpage-commercial-real-estate/) - [Farmingdale](https://sdnyrealty.com/farmingdale-commercial-real-estate/) - [Franklin Square](https://sdnyrealty.com/franklin-square-commercial-real-estate/) - [Garden City](https://sdnyrealty.com/garden-city-commercial-real-estate/) - [Glen Cove](https://sdnyrealty.com/glen-cove-commercial-real-estate/) - [Hempstead](https://sdnyrealty.com/hempstead-commercial-real-estate/) - [Hicksville](https://sdnyrealty.com/hicksville-commercial-real-estate/) - [Long Beach](https://sdnyrealty.com/long-beach-commercial-real-estate/) - [Mineola](https://sdnyrealty.com/mineola-commercial-real-estate/) - [Rockville Centre](https://sdnyrealty.com/rockville-centre-commercial-real-estate/) - [Suffolk County](https://sdnyrealty.com/suffolk-county-commercial-real-estate/) - [Babylon](https://sdnyrealty.com/suffolk-county-commercial-real-estate/babylon-commercial-real-estate/) - [Brookhaven](https://sdnyrealty.com/brookhaven-commercial-real-estate/) - [Hauppauge](https://sdnyrealty.com/hauppauge-commercial-real-estate/) - [Huntington](https://sdnyrealty.com/huntington-commercial-real-estate/) - [Islip](https://sdnyrealty.com/islip-commercial-real-estate/) - [Melville](https://sdnyrealty.com/melville-commercial-real-estate/) - [Riverhead](https://sdnyrealty.com/riverhead-commercial-real-estate/) - [Smithtown](https://sdnyrealty.com/smithtown-commercial-real-estate/) - [Southampton](https://sdnyrealty.com/southampton-commercial-real-estate/) - [Consulting Services](https://sdnyrealty.com/consulting-services/) - [Property Appraisal Services](https://sdnyrealty.com/property-appraisal/) - [Zoning Regulations](https://sdnyrealty.com/zoning-regulations/) - [Forms](https://sdnyrealty.com/forms/) - [Veterans & Military Housing](https://sdnyrealty.com/veterans-military-housing/) - [Join our Program](https://sdnyrealty.com/veterans-military-housing/#apply-now) - [Forms & Applications](https://sdnyrealty.com/forms/) - [Pay Rent](https://sdnyrealty.com/pay-rent/) - [Blog](https://blog.sdnyrealty.com/blog) - [Contact](https://sdnyrealty.com/contact/) # Extravagant Long Island Mansions that are Worth a Visit - August 09, 2017 - [residential real estate](https://blog.sdnyrealty.com/blog/topic/residential-real-estate), [Long Island Real Estate](https://blog.sdnyrealty.com/blog/topic/long-island-real-estate), [Long Island mansions](https://blog.sdnyrealty.com/blog/topic/long-island-mansions), [Mansions](https://blog.sdnyrealty.com/blog/topic/mansions) - 0 ![Extravagant Long Island Mansions that are Worth a Visit](https://blog.sdnyrealty.com/hubfs/Blog_Images/Long%20Island%20mansions.jpg) Since becoming a hub of American affluence in the 1920s, Long Island has attracted some of the richest, most successful individuals in the entire world. And really, with everything our area has to offer, who can blame them? The estates of these millionaires and billionaires have since become well-known Long Island mansions, each contributing to New York history in their own unique way. ## A Guide to the Most Famous Long Island Mansions   ### Oheka Castle Built in the 1910s, Otto Hermann Kahn, a philanthropist and financier, built [Oheka Castle](http://www.oheka.com/) on the highest point on Long Island, which happens to be in Cold Spring Harbor. Today, it is the second largest private home in the United States. With 127 rooms, this 109,000 square foot estate is home to an 18-hole golf course, one of the largest private greenhouse complexes in the U.S. and a French formal garden. In the ‘20s, Kahn threw extravagant parties that were attended by politicians, [movie stars](https://blog.sdnyrealty.com/blog/a-look-at-some-of-the-most-stunning-celebrity-homes) and royalty. ![Long Island mansions](https://blog.sdnyrealty.com/hs-fs/hubfs/Blog_Images/Long%20Island%20mansions1.jpg?width=320&name=Long%20Island%20mansions1.jpg "Long Island mansions") #### The History After Kahn passed away, the home went through several owners and served several purposes, including a military school and later a retreat house. After a complete renovation following years of dormancy, Oheka became a hotel and conference center. It is frequently used as a wedding venue for couples looking to capture that old-school, Gilded Age opulence. Taylor Swift even used the castle as the backdrop of her music video for the song, “[Blank Space](https://www.youtube.com/watch?v=e-ORhEE9VVg).” ### Hempstead House Sands Point’s Hempstead House was settled by Howard Gould, the son of railroad tycoon Jay Gould. As the main house of the manor, it has 40 rooms and takes up over 50,000 square feet of pristine [coastline real estate](https://blog.sdnyrealty.com/blog/the-most-beautiful-beach-houses-around-the-world). With vaulted ceilings, a sunken palm court and a walnut-paneled library, this tudor-style home is the absolute epitome of Jazz Age lavishness. Initially, the entire property was meant to resemble the historic Kilkenny Castle, which is located in Kilkenny, Ireland. ![Long Island mansions](https://blog.sdnyrealty.com/hs-fs/hubfs/Blog_Images/Long%20Island%20mansions2.jpg?width=320&name=Long%20Island%20mansions2.jpg "Long Island mansions") #### Sands Point Preserve Gould eventually sold the property to the Daniel Guggenheim family. After the elder Guggenheim died, his wife donated the home to the Institute of Aeronautical Sciences, who eventually sold it to the United States Navy. Later on, the property was given to Nassau County. It has since been used to host events, tours and weddings. Now known as [Sands Point Preserve](http://sandspointpreserveconservancy.org/), the estate has become a hub for Hollywood and was used as a setting in the show, “Gotham.” ### Eagle’s Nest The Vanderbilt family is one of the wealthiest, most influential families in American history. They have enormous properties throughout the world, but perhaps none are as magnificent as the Eagle’s Nest, built by William Kissam Vanderbilt II in Centerport. ![Long Island mansions](https://blog.sdnyrealty.com/hs-fs/hubfs/Blog_Images/Long%20Island%20mansions3.jpg?width=320&name=Long%20Island%20mansions3.jpg "Long Island mansions") #### The Museum Following his late death, the Spanish Revival-style estate, which is quite rare outside of Spain, was donated to the county. It was converted into a huge [museum](http://www.vanderbiltmuseum.org/) as a way to showcase Vanderbilt’s extensive collection of marine, natural history and ethnographic artifacts. The property is now used for a variety of reasons. It’s a museum, educational facility, wedding venue and it even has a planetarium. Plus, you won’t find better views of the sound at any of the other Long Island mansions. Visit one of these fantastic Long Island mansions sometime soon and you’ll see just how amazing our area’s [real estate](https://blog.sdnyrealty.com/blog/long-island-real-estate-market-in-2017) can be! --- [![Join The Commercial Courier](https://no-cache.hubspot.com/cta/default/432922/d68af3fc-de89-4dd0-bc71-e7dba2bb02f5.png)](https://cta-redirect.hubspot.com/cta/redirect/432922/d68af3fc-de89-4dd0-bc71-e7dba2bb02f5) ### Tags: - [residential real estate](https://blog.sdnyrealty.com/blog/topic/residential-real-estate) - [Long Island Real Estate](https://blog.sdnyrealty.com/blog/topic/long-island-real-estate) - [Long Island mansions](https://blog.sdnyrealty.com/blog/topic/long-island-mansions) - [Mansions](https://blog.sdnyrealty.com/blog/topic/mansions) ### [Previous post](https://blog.sdnyrealty.com/blog/homeowners-insurance) #### [Why Homeowner’s Insurance is Essential for Property Owners](https://blog.sdnyrealty.com/blog/homeowners-insurance) ### [Next post](https://blog.sdnyrealty.com/blog/mortgage-broker) #### [What to Ask a Mortgage Broker before Buying a New Home](https://blog.sdnyrealty.com/blog/mortgage-broker) ### Related posts [![How a Home Appraisal Determines Residential Property Value](https://blog.sdnyrealty.com/hs-fs/hubfs/Blog_Images/Home%20Appraisal.jpg?width=768&name=Home%20Appraisal.jpg)](https://blog.sdnyrealty.com/blog/home-appraisal) - September 26, 2018 - [Buying](https://blog.sdnyrealty.com/blog/topic/buying), [residential real estate](https://blog.sdnyrealty.com/blog/topic/residential-real-estate), [Selling](https://blog.sdnyrealty.com/blog/topic/selling), [property value](https://blog.sdnyrealty.com/blog/topic/property-value), [Refinancing](https://blog.sdnyrealty.com/blog/topic/refinancing) ### How a Home Appraisal Determines Residential Property Value Appraising a property plays a significant role in the real estate industry. 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