Did you know only five bioluminescent bays exist globally? Three of them are in Puerto Rico. These places, called “bio bays,” ...

A failing dam is causing "extremely dangerous" flooding on a Puerto Rico river in the wake of Hurricane Maria, authorities say. The National Weather Service (NWS) said the "imminent failure" of ...

The danger of flooding on a Puerto Rico river remains "due to the threat of a failure" of a dam in the wake of Hurricane Maria, officials say. The National Weather Service (NWS) extended flash ...

Highlights of the tour include the largest stalagmite in Puerto Rico, glimpses of the underground river (and maybe some bats), and a 450-foot deep sinkhole that allows light from the surface to ...