After the tunnels we visited the large and extravagant Cao Dai temple. As it was the day before the new moon festival the temple was very busy with many followers coming from all over Vietnam to worship here. The religion is a mixture of Buddhism, Taoism, Confucianism, native Vietnamese spiritualisation, Christianity and Islam. It all sounds very random but it clearly works for them! It was started in Vietnam in 1926 and there is only an estimated 2 to 3 million followers worldwide.
We were permitted to take some pictures from the balcony but I did feel like I was intruding so we quickly retreated and left the worshippers in peace.