I spend the day exploring Tijuca National Forest - which claims to be the world’s largest urban forest as it covers around 32 km squared. We are picked up in an open backed jeep, and our drive from Copa to the forest borders on frightening. Rio traffic is scary enough in a closed vehicle, but being exposed brings this fright to a new level. However, we also have really great views. As we exit one of Rio’s many tunnels, the driver points out the favela that sprawls the hill ab