The headquarters of Cao Dai sect is located in Tay Ninh. This religion was founded in 1923 and now numbers over 2 million members. After breakfast we travel by road to Tay Ninh to see the ornate temple of Cao Dai and attend the fantastic mid-day service when the followers fill the hall wearing colored robes, a symbol of the curious combination of the Confucianism, Taoism and Buddhism. Afterwards we continue to the famous Cu Chi Tunnels, which were an incredible underground network constructed by Vietnamese fighters during the long struggle for independence. The tunnels contained hospitals, plus accommodation and schools, and were used as a military base for the Vietcong in the American war.