The four smaller prangs that surround the main one, each house a statue of Phra Phai, the wind-god, placed in niches. As such, the four smaller prangs symbolize the four winds. Statues of giants and monkeys surround all structures and aim to support them.
In the middle of each side of the square formed by the smaller prangs mondops (porches) ae located, that contain Buddha images depicting the four stages of the Buddha's life : birth, meditation, preaching and enlightenment.
From the highest gallery you reach, you get a good view over the Chao Phraya river.