An Oklahoman town so wealthy it inspired a Hollywood film and in Cambodia's capital, a place of learning that was turned into a chamber of horrors.

A crumbling hotel built with stolen oil money located in an Oklahoma town so rich it inspired a Hollywood film. A former school in Cambodia, that became a chamber of horrors used to oppress an innocent population. In Latvia, a Soviet-era radio telescope that intercepted the West's most top-secret communications. And a fantastical construction in Italy, that combined the romance of air travel with renaissance art, and pizza.