This (almost) century-old, French-style château was built to the tune of $11 million — a value of more than $100 million by today's standards. It sits on 443 acres on the highest point on Long Island, and during its 1920s heyday, it was a mecca for royalty, heads of state and Hollywood celebrities. After decades of varied uses and even abandonment, it was meticulously brought back to life, with its original elements being renovated or reconstructed using historically accurate materials. Today, there are 32 individually decorated guest rooms and suites, as well as a grand ballroom, library and formal gardens (originally designed by the Olmsted brothers) with eight reflecting pools. Days begin with complimentary breakfast in the formal dining room, after which guests can explore Long Island wine country, unwind with an in-room massage or enjoy exclusive golf and tennis privileges at the Cold Spring Country Club.