Located on a wooded promontory overlooking the Delaware River, Andalusia has been a stately presence on this stretch of water, just north of Philadelphia, for more than 225 years. The ancestral home of the Biddle family, Andalusia is also a natural paradise of preserved native woodlands and spectacular gardens that continue to evolve today. The mansion at the center of the property—called the Big House—is one of the finest examples of Greek Revival architecture in the United States. Placed on the National Register of Historic Landmarks in 1966 and opened to the public in 1980, it provides an unparalleled look into the nation’s past, while offering a glimpse into the lives of the influential family that lived there.