Spanning over 100 sq km, this 'garden' is actually the world’s largest urban forest. There's a network of five short trails (guides and closed shoes required, two to three hours, free with admission) and an open-air museum (MUSA; Museu da Amazônia) which includes rotating exhibits on Amazonian flora and fauna and a spectacular 42-meter observation tower. Busier on weekends.
Comfortable shuttles (99286-9888, R$30 round trip, 45min) leave from outside the tourist office (CAT) at 9am and 4pm. Otherwise, catch Bus 676 (R$2.50, 1hr) from Praça da Matriz.