At 12-hectare Senda Verde, there's a new concept: humans are 'caged' while most of the 200-plus monkeys run free. This protects people and monkeys alike (adult monkeys can be aggressive, and sick humans can infect their simian cousins). Toucans, caimans, Andean bears, ocelots and margays are among the other wild residents. There’s a nice buffet-style restaurant on-site. Located 500m north of Yolosa (B$40 taxi or B$10 minibus from Coroico).