First the guide explained the difference between the two names. Saigon was the capital of south Vietnam before the Vietnam/American war. When North Vietnam won they changed the name to Ho Chi Man City, but today, the center city or the “original” city is still called Saigon and the new growth and the official name is HCMC. I think it is like sports stadiums. Denver Broncos will always play at Mile High, no matter who owns the franchise rights and so it is in Vietnam.
The Chu Chi tunnels run over 250 km and were built by the north to be able to infiltrate into the south during the war. they could hold over 8,000 people with eating, medical and strategic planning. They let you crawl in, I got into the tunnel the width is just enough to slide your body down then you can choose to crawl foe a hundreds meters so you can experience how close the walls were and how hard it was to maneuver. I got out of that opportunity. The museum explained and had examples of some of the traps they used. Interesting history, but a little goes a long way.
Back in Saigon that evening we found a circus tent erected in a park near our hotel, so what the heck . . . . The people were so strong and built so compact, they make amazing acrobats. There, among all the other kids, we ate ice cream and clapped and cheered the show. Then . . . so long Saigon.