As I whizzed along a wire 100 metres high among the treetops, it occurred to me that this definitely wasn’t your usual way to explore a nature reserve. But to really see much of the Monteverde Cloud Forest, you’ve got to get up high. The reserve covers 26,000 acres of rainforest with over 2500 plant species, 400 types of bird and hundreds of butterfly, insect and mammal species. Though it’s not all that easy to spot them, as the clouds that give the forest its name lay over it like a blanket much of the time. The forests are formed when moist winds blowing from the coast collide with the mountain range and condense into a fine mist.