Boscobel House and Gardens is a historic house museum in Garrison, New York, overlooking the Hudson River. The house was built in the early 19th century for States Dyckman. It is considered a significant example of the Federal style of American architecture, augmented indoors by a scheme of decorative elements and a collection of furniture, which, w…Boscobel House and Gardens is a historic house museum in Garrison, New York, overlooking the Hudson River. The house was built in the early 19th century for States Dyckman. It is considered a significant example of the Federal style of American architecture, augmented indoors by a scheme of decorative elements and a collection of furniture, which, while not original to the house, are considered to be representative of the Federal period.