Costa Rica

While this country has long been known for ecotourism and medical tourism, there are tons of things to experience.  This volcano is longer considered active, but Arenal is still pretty neat to see.

I was fortunate enough to see it erupt back on New Years eve 1999 - 2000 from Tabacon Springs but on subsequent visits I just saw some steam.

Costa Rica continues to draw tourist who are loving it to death, but that seems to be the case of most fringe destinations, with 1.2 million visitors from the states, up from 0.75 million just ten years earlier. It is becoming less an ecotourism destination and more like just any other tropically one. 
Too bad.