Spring is actually the optimal time to visit a Costa Rican rainforest as mid-December through April is its dry season.  There are amazing properties throughout the country, but in the spirit of going green, I recommend an eco-friendly wellness escape to El Silencio Lodge & Spa.  Comprised of 24 freestanding stilted accommodations to minimize environmental impact — the lodge set on 500 acres of cloud forest promotes a holistic concept of tourism.  Here you'll hike to hidden waterfalls, enjoy cultural experiences, and exceptional treatments at the nature-immersed spa.  Dine on delicious organic cuisine before retreating to your elevated luxury suite.
 
Private perks: $100 spa credit, complimentary daily breakfast, early check-in/late check-out, upgrades, and more.