Heading out into the field on Cape Horn Island (Isla Hornos) to begin the search for the southernmost tree. Having ruled out the posibility of trees growing on the cliff face of Cape Horn, Brian Buma and the team head south towards the Horn to explore areas further inland. Fear of approaching bad weather has made this a priority for today. The island's Nothofagus Betuloides trees are sometimes hidden in creeks, making the ground before you appear largely flat until you disappear underneath it , as was the case when the expedition first arrived. But today, having established pathways, the team use the trees to help cross the creek.