This morning after breakfast, proceed to a half-day tour to the Cu Chi Tunnels, 75 km northwest of downtown Ho Chi Minh City, which were once a major underground hideout and resistance base of Viet Cong forces during the two wars against the French and later on Americans. The tunnels, entirely hand-dug, formed a highly intricate network of interlinked multilevel passageways at times stretched as far as the Cambodian border and totaling over 120 km in length. Its complexity was beyond imagination, containing meeting rooms, kitchens, wells, clinics, schools, depots, trenches and emergency exits all aimed for guerrilla warfare. The tunnels were deep and strong enough to withstand destructive bombings and self-contained enough to outlast prolonged sieges. Back to Ho Chi Minh City and spend time at leisure. Later in Afternoon, take a half-day city tour to visit the former Presidential Palace, headquarters of the Saigon Government during the Vietnam-American war. You may also like to visit the War Remnants Museum for a vivid insight into the Vietnam-American war from a Vietnamese perspective. Next stop is the Notre Dame Cathedral, a red brick building with twin spires based on the original construction from Paris, then head across the square to the Central Post Office designed by the French architect Gustav Eiffel. Return back to the hotel. Overnight stay in Ho Chi Minh.