Wat Pho is right next to the Grand Palace precinct, so if you're up for more walking, it's a great addition to your palace tour. It's the oldest in Bangkok and has been a place of healing for a long time. It was also known for its pharmacy and for being the first "university" in Thailand, both built by King Rama III. You can get a foot massage at the traditional school on the grounds, but the prices are much higher than at massage parlours in other parts of the city.
Today, Wat Pho is best known for the Temple of the Reclining Buddha, where you can see a huge statue that is 45 meters long and 15 meters high. You can only see it in parts. Among the many precious stones inlaid into the soles of her feet are some of the most beautiful. Also, look for long earlobes to show that the person is of noble birth, and the lotus-bud shape of the hand to show purity and beauty.