Reach the Gamboa pier and board a small boat for the rides to the different Islands with your Panama City tour guide to explore wildlife, especially monkeys. 3 different species can be observed in that area. 

Go on the Chunga Trail. This is where the trekking activity takes place; explore the rain forest and learn a lot about the different species: Trees, plants and more; also, monkeys can be seen in this area.

Go to the Exhibitions Area to take a real and closer look at what is available in this tropical land rain forest, animals, plants, and of course, the second meaning of the name 'Panama' in one species in particular.

Observe the sloths and learn surprising facts about them in the Sloth Sanctuary. 

Next is a great lunch (buffet, most of the time) in the restaurant by the lake where Caiman is often seen, or at another restaurant with the Gatun in Gamboa Hotel with a lake view.