This town, about 2.5 hours outside of Saigon is the spiritual heartland of the Cao Dai faith. There is a massive compound, including Cao Dai's largest cathedral, but also including monasteries, nunneries, schools and homes for the religion's leaders. I only spent an afternoon there, not knowing what a massive complex it is. If I ever go back to Viet Nam, I will definitely budget a few days in Tay Ninh.