Question

Why is Costa Rica a good vacation spot?

Answer 1

#Costa Rica = 'The Living Eden'

#"...Costa Rica is often referred to as ‘the living Eden’ by many scientists and naturalists from all across the globe."

#Has biosphere reserves and national parks (25% of the country’s land has been set aside and turned into protective parks and reserves so as to safeguard the beautiful and lush environs from deforestation and logging)
-La Amistad International Park
-Barra Honda National Park
-Corcovado National Park
-Las Baulas National Marine Park
-Turrialba Volcano National Park
-Arenal Volcano National Park

#Is the habitat of 12 key ecological zones.

Here's a good source to get you started.  
http://www.govisitcostarica.com/travelInfo/nationalParks.asp