Ak'bol
We're not sure what could possibly be more relaxing than the turquoise Caribbean sea. Belize's Ak'bol Yoga Retreat offers some of the most beautiful grounds on this list, as well as some of the greatest views. Features are similar to other retreats, but what sets Ak'bol apart are the "mayan healings," and we could always use some of those.
[Photo via @cdtimmons]