Backpack 4, Viet Nam Cu Chi – Tunnels February 23, 2015 Fourbackpacks With speed boat up the Mekong (ignore the red straight line – that is the flight in from Hoi An). Then into the tunnels: really? Here? yup, they’re gone! Into the tunnels – this is a bigger on Papa fit in as well (barely). Lunch is nicely fried crickets,….