Casco Bay Island Compound
Medieval Castle in the Midwest
Gaudy Gilded-Age Mansion

Location: Cumberland, Maine

Price: $1,750,000

Occupying a private three-acre parcel on the southern end of Sturdivant Island, near Falmouth, this compound would make the perfect land base for a sailor looking to explore Maine's cruising grounds. Equipped with a deep-water dock, a seasonal cottage with two bedrooms, 1,100 feet of waterfront, and an uninsulated billards shack, this place offers the sort of diversions any sea-weary sailor might want. Plus, it looks like the $1.75 million offering is already occupied by some seafarers, judging from the burgees hanging on the wall. Well, that, and the fact that you'd need a boat to reach this tiny island.