Cachoeiras do Horto encompasses three waterfalls, which can be accessed by a medium-difficulty hike in the woods. They’re some of the many waterfalls found in the Tijuca Forest, a national park in the heart of Rio de Janeiro and the world’s largest urban forest. Tijuca National Park is a 40 square kilometer swath of the Atlantic forest, a vast ecosystem that contains impressive biodiversity. The Atlantic forest once covered over 350 million acres, but logging, development, and other human activity have destroyed an estimated 88 percent of the original vegetation. Tijuca is…