The Hudson River Valley, which stretches from Yonkers to Albany, beckoned many wealthy families of the 1800s, including the Vanderbilts, Rockefellers, Mills, Goulds, and Roosevelts. We had less than 24 hours to explore and most of our time was spent at the FDR Birthplace and the adjacent FDR Library & Museum in Hyde Park. However, we did manage to swing by the Vanderbilt Mansion and other spots along the Hudson River.