Explore the Outdoors: Puerto Rico's Top Nature Tours
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… El Yunque Rainforest Spend a day (or half-day, if you prefer) in the only tropical rainforest in the United States … where the microscopic sea plankton pyrodinium bahamense can produce fluorescent light when disturbed. Although you’ll be … watch the interaction with the organism, in an effort to protect their habitat, swimming is not allowed. You’ll be …