Visit the Cao Dai Temple in Tay Ninh (120 km) where daily Mass is done by the Caodaism followers at noon. Cao Dai is a combination of Buddhism, Confucianism, Taoism, native Vietnamese spiritualism, Christianity and Islam.
On the way back to Saigon, see the Ben Dinh tunnels in Cu Chi province. The tunnels were used as a strategic base to organize efficient attacks and defenses during the Vietnam - USA war. There left a lot of evidences to indicate the intense fighting, bombing and destruction which were carried on in Cu Chi during the war, as well as the hardiness of the Vietnamese people and soldiers. Return to your hotel in the late afternoon.