We went on the Bayano Cavern trip with Javier. Javier was very responsive and flexible with our needs. The whole trip was very smooth, well organized and safe.
Both the lake and the caves are an amazing place to visit. On the boat trip to the caves, we got great views of the lake and lots of birds including cormorants and ospreys.
Entering the cavern, we waded through the river and saw the beautiful formations inside. Walking in the water over the slippery rocks takes some care and getting used to, but is not particularly difficult for people used to hiking. Hiking boots are a good idea, and the water temperature is cool.
We saw lots of wildlife including frogs, fish and many bats inside the cave. In some places it is dark and requires headlamps, in other places the light passes through the tops illuminating the cave with cool light. At the end of the cavern we swam in the clear water of the lagoon, where we also saw a toucan and hummingbirds. We returned to the entrance on the same route, and then ate a delicious lunch before getting back on the boat to return to the car, change clothes (and watch some monkeys), then drive back. The caverns are a unique and beautiful place and there's great opportunities to see wildlife. Javier is experienced and responsible and knows the area very well. Overall the trip was a great experience.