you have to come and see this sometime in your life. wow! next, we join the husband—and—wife team on an incredible zero carbon adventure around wales, and so far they have completed almost 400 miles over hills and valleys under their own steam. now, it's time for them to tackle the spectacular and sometimes precarious welsh coastline in a boat powered just by pedal. we are on a circumnavigation of wales using just human power, so we're biking, walking, canoeing, pack rafting and using a specially designed pedal powered boat. this is an eight metre by 1.5 metre boat made out of wood,