We did a half-day tour to the Cu Chi tunnels by 'luxury' speedboat with Les Rives Authentic River Experience tours. It was an early start (7.00am) but it meant we got to the tunnels ahead of the crowds that seem to arrive from about 11.00am onwards. The boat ride was pretty basic but it was certainly better than sitting in traffic with all the other tourists! Our guide was excellent and particularly passionate about the history behind the tunnels as his father had been involved in the war. This gave our tour a very authentic voice.