If you're ever in SGN, I recommend avoiding the (in)famous Cu Chi Tunnels. NOTHING there is original or authentic. The tunnels that were supposedly dug by the VC to move without detection (and now you, the visitor, can go through) were recreated.

About the only thing real there is the destroyed American tank (a Sherman, I believe) that tourists are all too happy to treat as a jungle gym.

Bottom line, it's a 4th class amusement park designed to take tourist money. It's appalling, quite frankly.