I researched on youtube for a video on “world famous spa” and got this video on Banyan Tree Spa Resort. It is based in Thailand. The best part is the Fitness Center Yoga, meditation and tai chi.I mean if you are really staying at this famous spa, you can pick up basic tai chi or yoga from the instructors. Get a feel of them. They are known to be improve your health in many ways. If you want more outdoor, there are even canoeing lessions for you as well.