Some Mexican groups have set up training camps and storage facilities in the jungles of Petén, a “big green hole of nothing” in northern Guatemala, according to Mr Stewart.

What we will have come to us, is a corresponding response from every neuron, for example in the upper left, you would see a green little hole.

Once you have made the Dakota fire hole you can easily set up a cooking surface for pots and pans by laying several parallel green sticks across the fire pit as show in the picture.