If you’re anything like me, it’s hard to pass up a good mystery. It doesn’t matter if we are talking about Jimmy Hoffa going missing in Detroit or crop circles on the Salisbury plain in the UK. And I love sharing the knowledge about these mysteries with ANYONE who will listen. So let me share with YOU the secret bar in the busiest place – The Campbell at Grand Central Terminal. The Knowing You may wonder how we came to know about this awesomely wonderful super-secret bar. Well, not only are we avid travelers, we like to read about travel. And we like to talk about travel. Also I would…