About This is a shorter version of our River Caving Tour. A real adventure in nature! We will take you on a guided interpretative tour through the magnificent and unique underground river cave Portillo, where we kayak through the 1,000-foot long tunnel, a magical space where you can hear the sounds of nature and see the existing fauna. This tour includes: Kayaking through the underground river cave in the Tanamá river Spectacular views of the karst region Forest hiking (moderate-semi intense) Jumping and swimming in natural pools, free jumps and breathtaking views of the Northern Karst forest Crossing our 150-foot long suspension bridge over the Tanamá river