Wat Cha Lor The old temple beside the Bang Kruai canal, it has a history dating from the early Ayutthaya period. No clear evidence about the build of the temple. But, it is unique and unlike any temple in Nonthaburi province that is it has a largest swan church in the world which is visually appealing and unforgettable experience as a highly. he built the new church as the largest church in the world as a Supannahong boat and decorated with color glass and gold leaf patterns with spectacular formations.