Within the grounds of Wat Pho lies Phra Rabiang, a cloister of approximately four hundred different Buddha statues some of which date back several centuries. These statues are covered in gold leaf to protect them from the elements and many are adorned during times of celebration such as Buddhist lent.
The cloister surrounds Phra Uposatha, the Ordination Hall used for Buddhist rituals. Constructed by King Rama I this is the most sacred building within the grounds of Wat Pho. If you get a chance to light some incense and reflect upon life at Phra Uposatha, I strongly recommend it.