The Wat Si Sawai’s most striking feature is the three well preserved Khmer corncob shaped prangs. The central tower measures about 15 meters tall, the two towers flanking it are a few meters smaller. The prangs covered with white stucco are set on a low base surrounded by a gallery. Towards the end of the 12th century or early 13th century the Khmer started construction of the prangs, but left them unfinished. Centuries later during the Ayutthaya era in the 15th century they were finished in the Lopburi style.