Desecheo

Desecheo Island is a 360-acre uninhabited island approximately 14 miles west of mainland Puerto Rico. During World War II, the military acquired the island, and, between 1940 and 1964, they used it as a bombing and gunnery range and for other training activities. In 1964, the military transferred ownership to the National Institute of Health who used it for scientific experiments. In 1976, Desecheo Island was transferred to the U.S. Fish and Wildlife Service, and since 1983 the Island has been managed as a National Wildlife Refuge.

RECOGNIZE - The object you found could be dangerous.
RETREAT - Leave the area without touching or moving the object.
REPORT - Call 911 immediately.