First of all, if you are staying in a lodge, they will surely make you visit the jungle either by walking for "bugs-watching" or in canoe for bird-watching. Let them introduce you to the fauna and flora of their environment.
Anyway the jungle is a paradise for Bird-Watchers so that can be an activity in it self.
For the ones who are more after sensations, the jungle is also a perfect place for Rafting.
