I would also recommend Jaguar Paw. While the hike to the cave tubing is hot and takes about 30 minutes, the tubing is very refreshing and easy. The hike is through the jungle and you will see really cool wildlife. Try to pick a day that the cruise ship passengers aren't in port since some of them go the Jaguar Paw. The fewer people the better since it can get noisy in the caves. This isn't a white water raft trip; it's a relaxing lazy day on a slow moving river. Very soulful and relaxing if you get the right guide. If you rent a car and drive, stop by the watering hole across from the zoo...cool bar! Also, if you drive, don't get dismayed if the drive seems weird after you turn off the main highway...you go for about 30 minutes on a rough road through orange groves...very neat drive...but seems like the road to nowhere the all of a sudden...Jaguar Paw