Go for the sprawling sea, salty spray, saffron sun, slight breeze, and sweet shimmer: beach bums live for the ocean. And often, too, he or she knows the best bar on the boardwalk for an ice-cold beer (or Mai Tai) as the sun starts to set...

No trail too harrowing, no peak too vertiginous, no cenote too deep; the adventure addict wants it all, and then wants to do it all over again.

The urban obsessive. The neighborhood mapper. The metropolitan historian. They know everything there is to know about the big city, and you should listen to what they have to say.