The Gregory House is in Torreya State Park, in the Panhandle. It’s one of my favorite state parks. Two others I’m fond of are also in the area, Florida Caverns State Park and Falling Waters State Park. Torreya is probably the only place in Florida that you can see major fall leaf color change. Not like in New England, but pretty nonetheless. It’s due to the area being a microclime that mimics further north weather. If you visit, the best time to see the fall colors is October and November. Call ahead, though, to ask if the color change has happened, as it varies from year to year.
The house was built in the 1840s, and used to be on the other side of the Apalachicola River. After the Civil War, it was abandoned. When the park was being created and worked on by the CCC, the house was taken apart and reassembled in the park on a 150 foot bluff overlooking the river. The house is included in “A Guide to Florida’s Historic Architecture”. The park itself is listed on the National Register of Historic Places, and is also a National Natural Landmark. See more photos here.