American road-trip aficionado Jim Hinckley recommends Old West ghost towns to visit before they fade away. Then Irish singer Cathie Ryan explains — and demonstrates — how Ireland remembers its heroes in song. And journalist Carl Hoffman lets us in on what he's concluded after researching the disappearance of banking scion Michael Rockefeller, who vanished in 1961 while on an art-buying expedition in the jungles of New Guinea.

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