After crawling through a few of the tunnels that have been somewhat expanded for tourists and seeing the displays of recovered bombs, people who were not involved in the Vietnam War (called the American War there) can get a feeling of the horror that occurred during those years. A system of 125 miles of tunnels became almost a complete underground city. The picture offered above is the delivery bomb of cluster bombs from the U.S. The Vietcong recovered many of these and other unexploded bombs and used them against South Vietnam and the U.S.
It is a sad place but worth going for a better understanding of why the U.S. lost this war.