For a fabulous backcountry hiking experience, consider the Trilha do Ouro backpacking adventure, a three-day, 53km hike through the wildest reaches of Parque Nacional Serra da Bocaina. The trek starts in São José do Barreiro in São Paulo state and visits a number of spectacular waterfalls en route towards Mambucaba, on the coast 45 minutes northeast of Paraty. The price includes transport to the trailhead, park fees, food, simple lodging and an excellent local guide.