Sport Island sits in New York’s Thousand Islands, the St. Lawrence River archipelago along the Canadian border that became one of the Gilded Age’s fashionable summer destinations. Built around 1880 for a prominent Pennsylvania railroad-industrialist family, the property has since undergone a substantial partial restoration.

A rare multi-structure coastal compound in Corfu, Heliophos Estate trades a single villa for an entire private bay experience shaped by landscape, privacy, and uninterrupted sunset-facing sea views.

A remote Scottish castle estate on the Isle of Mull brings together an 18-bedroom Baronial castle, more than three miles of Atlantic coastline, three lochs, woodland, farmland, holiday properties, and an established working estate economy.

Gråskär is a 2.6-hectare / 6.4-acre private island in the Finnish archipelago, offered with a prepared master plan and the chance to create a design-led cabin retreat inspired by the world of Project Ö.

For less than the price of many luxury apartments in New York City, buyers can purchase a private island with a 1912 cottage in Connecticut's Thimble Islands.