Tourists could try to fit, lower themselves into the hole, and then put a wooden cover on top of them that had leaves and dirt on it to blend in. It was sobering to see tunnels that people lived in during the war, and trap that killed Americans like they were animals.
I explored Ho Chi Minh City, Vietnam, and needed to ship some items back to the U.S. I just missed the cutoff time and begged to be let in. I also explored a war museum, but my stomach was really hurting.