Alliances were tested, enemies were made and one player learned that there’s no playing nice on the quest to win that ...

We're talking about Switzerland here ... physicists and meteorologists – at Jungfraujoch's labyrinthine Sphinx Observatory, which bears some of the hallmarks of a James Bond villain's lair.

It’s easy to see the draw to “Destination X.” Travel around Europe, and possibly win $250,000 if you can guess correctly ...

One of them takes you to Europe's loftiest train station.