<p class="ingestion featured-caption">You can see the French influence here, as well.Gabbi Shaw/Business Insider</p><ul class="summary-list"><li>Falaise is one of three 100-year-old <a target="_blank" class href="https://www.businessinsider.com/gilded-age-mansions-photos-wealth-2024-9">mansions</a> open to tour at Sands Point Preserve on Long Island.</li><li>Falaise was built by Harry Guggenheim in 1923 and was modeled on a 13th-century French manor.</li></ul><p>Long Island's North Shore is famous for being the inspiration for F. Scott Fitzgerald's iconic novel "<a target="_blank" class href="https://www.businessinsider.com/tour-oheka-castle-estate-inspired-the-great-gatsby-2024-5">The Great Gatsby</a>," which took place in the fictional towns of West Egg and East Egg.</p><p>One hundred years later, some of the best-maintained examples of the mansions frequented by characters like Nick, Gatsby, Jordan, and Daisy are located in <a target="_blank" class href="https://www.businessinsider.com/sands-point-preserve-mansions-tour-photos-2024-7">Sands Point Preserve</a>, a 216-acre park that was once home to the Gould-Guggenheim Estate.</p><p>Inside Sands Point, there are four mansions. Three are open to the public: Falaise, <a target="_blank" class href="https://www.businessinsider.com/hempstead-house-mansion-long-island-photos-2024-7">Hempstead House</a>, and Castle Gould. The remaining mansion, Mille Fleurs, is a private residence.</p><p>In September, I visited Sands Point to see Falaise, the most mysterious of the three — tours are only available on weekends and you can only get there via Sands Point's transportation.</p><p>I paid $30 to visit ($15 to park and $15 for a tour), and I learned about its former owner, Harry Guggenheim, his passion for aviation, and his interest in art.</p><p>While I couldn't take photographs inside the mansion — adding yet more mystery to the property — I was able to document its stunning exterior and European-inspired details.</p><p>Here's what it was like to visit Harry Guggenheim's summer home.</p>