We hiked through the Bayano Caves, which is essentially an underground cave and river, swam in snake and cayman - infested waters, came across four Fer - de-lances (
really deadly snakes) and a scorpion, stood in the cave / river while thousands of bats whooshed over us like a giant bat - wave, and in the end reached a beautiful natural pool that twinkled and that we could have stayed in forever.