The wall pools of Glenmere mansion&#x27;s southern garden, circa 1920 - The Glenmere mansion, overlooking Glenmere Lake, approximately 50 miles northwest of New York City in Orange County, New York, was built by New York City real estate developer Robert Wilson Goelet (not to be confused with his first cousin Robert Walton Goelet) in 1911, on the grounds of his sprawling estate in Sugar Loaf, a hamlet of the town of Chester, New York.