Before entering the amazing city temple of Angkor Thom we crossed the causeway spanning the moat in front of each tower.
These bridges have a row of devas on the left and asuras on the right. They are huge and towered over me as I stood next to them.
Each row holding a naga in the attitude of a tug-of-war. This appears to be a reference to the myth of the Churning of the Sea of Milk.
The temple-mountain of the Bayon, or perhaps the gate itself, would then be the pivot around which the churning takes place. The nagas may also represent the transition from the world of men to the world of the gods (the Bayon), or be guardian figures.