Northeast of downtown Bradenton, this is the oldest structure on the southwestern coast of Florida, and a fine example of an antebellum plantation home -- something that's rare in Florida. It was constructed during a 6-year period in the late 1840s by Maj. Robert Gamble, made primarily of "tabby mortar" (a mixture of oyster shells, sand, molasses, and water), with 10 rooms, verandas on three sides, 18 exterior columns, and eight fireplaces. Now maintained as a state historic site, it includes a fine collection of 19th-century furnishings. Entrance to the house is by tour only, although you can explore the grounds on your own.