I visited Mexico's hidden coastline to uncover why the wealthy are flocking there, and how it earned the name the 'Happy Coast'

I visited Mexico's hidden coastline to uncover why the wealthy are flocking there, and how it earned the name the 'Happy Coast'

Costalegre is Mexico's "Happy Coast."Monica Humphries/Business InsiderI arrived at Mexico's Happy Coast stressed, anxious, and, frankly, unhappy.Within minutes of arriving in Puerto Vallarta, I was standing at the rental car company, utterly confused. Three hundred unplanned dollars later, I was driving three hours on a pothole-filled road to my first resort in Costalegre.As I crawled behind slow mopeds and put my rental car's suspension to the …