Experience the Winterthur Museum - including a guided tour. A visit to Winterthur will immerse you in another time and place. Winterthur is a great American country estate nestled in the heart of Delaware's beautiful Brandywine Valley, halfway between New York City and Washington, D.C. It offers a variety of tours, exhibitions and programs for all ages to enjoy. Discover the museum's magnificent collection of American antiques celebrating the best in style and craftsmanship. Delight your senses with a stroll through the glorious 60-acre garden and surrounding landscape of woodlands, waterways and rolling meadows.