Accepting offers over £750,000, Kinloch Castle awaits a visionary custodian. The island’s forty residents — guardians of the Isle of Rum’s nature reserve and heritage — hope for a sensitive revival that honours its ecology as much as its history.

For £5.5 million, you can buy 1,110 acres of Scottish wilderness—and a castle to restore, built by an Antarctic explorer whose architect sank with the Titanic.