Puerto Jimenez, Osa Peninsula
Read this amazing article about the experience at Nicuesa Lodge, by Costa Rica Talk:
"Costa Rica may be small, but it is a country that conceals more than one jewel ... In this case I had the opportunity to visit one of them. A small lodge called "Playa Nicuesa Rainforest Lodge", located in the Golfo Dulce, in the south of Costa Rica."