Gorakshasana (The Master Pose). This was taken while enjoying a few hours at a lake side restaurant and day resort in Macaia, Brazil while on vacation there this summer with my wife, son, and brother-in-law and his family. It is said mastery of this posture slows and then reverses aging. It is also said to free the mind from negative thoughts and base emotions, enabling the mind to then discover the psychic and spiritual energy that often lies dormant deep within us.
It’s hard to see from the pic but I am actually sitting on top of the feet with my sacrum forward of the heels and with the perineum or pelvic floor resting on the inside edges of the feet. Sometimes Gorakshasana comes fairly easily to me but at other times it’s a real challenge to bring the legs down in contact with the floor while sitting on the feet.
For more info on Gorakshasana please visit this Yoga International article