This curvy-roofed guest house, part of a five-acre Gulf-to-bay vacation North Casey Key compound designed by Sarasota architect Jerry Sparkman, is an architectural marvel that earned the 2010 Gold Best of American Living Award from the National Association of Home Builders. The graceful, one-of-a-kind arched roof, inspired by and nestled into a grove of windswept live oaks on the property’s bayfront, is a contemporary expression of resort-style living that evokes memories of a childhood treehouse. Now, to wrangle a stay-over invitation…

See all 10 homes in our October issue, online Sept. 28.