What’s In: The Unexplored.  “People are just finding out about Pamukkale, Turkey, and it’s going to explode. This is an amazing natural wonder. It is full of hot springs, which have created gorgeous rock formations that look like ancient castles. Parga, Greece, a tiny, little coastal community that is still undiscovered, is also gaining steam. Get there before the crowds do and hike to the hilltop where a 15th-century Venetian castle sits. What’s Out:  “Cities on the decline are, unfortunately, New Orleans, then Miami and Honolulu. That’s not to say they’re not still popular destinations; we’re just seeing less chatter about them."