Once you enter at the Watyaichamongkhol you can see
Wat Maha That, Buddha image enclosed by the roots of a big tree. Wat Maha That was a royal monastery and has been the seat of the Sangaraja, the head of the Buddhist monks of the Kamavasi. Wat Maha That was restored once again during the reign of King Borommakot (1732-1758). If you want to take a picture, you are not allowed to stand over the Buddha's head.