Costa Rica 

Yoga  & wellness retreats in Costa Rica Mal pais in a amazing jungle lodge on the pacific coast , yoga & meditation classes  , Ayurvedic holistic treatments ,en suite rooms, delicious food , and a range of optional activities from surf to horse ring  & more -
Sunflower Retreats established since 1998 -  https://www.sunflowerretreats.com/yoga-retreats-in-costa-rica/