Despite having being enlarged (for tourists) these tunnels are often still really cramped and no-one should try going through them if they suffer remotely from claustrophobia - also almost immediately from entering the insides are pitch black and sometimes go quite deep underground.
Towards the end of the tour round the Cu Chi Tunnels there is a small drinks and souvenir area and also you can if you wish go onto the nearbye shooting range and try out one or two old war time guns including m16s and AK47s. (firing
these guns costs around USD2 a bullet though).
Our items about Ho Chi Minh City in Vietnam - things to do and see there.