Gordon and Jean Avery run this enchanting, adults-only B&B in an 1864 Greek Revival farmhouse nestled in the tranquil Fort Hill area (it is the only lodging within the National Seashore). The location is perfect—minutes off busy Route 6, but steps away from quiet, secluded trails that wind through cedar forests, fields crisscrossed by old stone fences, and a red-maple swamp. Two very large and cozy suites in the main house, tastefully decorated with period pieces and antiques, share a living room with fireplace. The crown jewel, however, is the light and airy Nantucket Cottage, with stone floors, a gas fireplace, and a classic white-and-blue Cape Cod bedroom loft. Breakfasts are superb, with offerings like oven-poached pears in sweet cream.