A space to relax outdoors amongst the trees! Love this idea for a basic platform tree house. You could get a big tarp to cover the blankets and pillows when the tree house is not in use.
Surfing is a must try in Costa Rica. You can get surf lessons pretty much anywhere on the beach. It is one of the most popular things to do in Costa Rica. Tamarindo, Jaco, and Puerto Viejo are great places to surf.