SAN JUAN, Puerto Rico – A glowing lagoon off Puerto Rico’s northeast coast has gone nearly dark and biologists on Tuesday were trying to find out why. Theories range from an increase in construction ...

Watching phytoplankton illuminate the world's shores is an otherworldly experience. With a bit of luck and perseverance, ...

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

For a unique, nature-based experience on your beach vacation, head to "Puerto Rico's Garden," a gorgeous inland area filled with waterfalls and verdant cliffs.

(AP) A glowing lagoon off Puerto Rico’s northeast coast has gone nearly dark and biologists on Tuesday were trying to find out why. Theories range from an increase in construction runoff to inclement ...