There are five National Natural Landmark sites located within the Commonwealth of Puerto Rico. Natural features represented include the best example of a bioluminescent bay in the U.S., the largest, most extensive and most unusual sea caves in the world, and an excellent example of a tied island known as a tombolo. All five sites received NNL designation between 1975 to 1980. Sites range in size from 610 acres to nearly 14,154 acres and are owned by a variety of landowners including the U.S. Fish and Wildlife Service, U.S. Forest Service, Puerto Rico Department of Natural and Environmental Resources and private individuals.
Below is a map of sites in Puerto Rico.
Please remember, National Natural Landmarks (NNLs) are not national parks. NNL status does not indicate public ownership, and many sites are not open for visitation.