Molasses Reef is a coral reef located within the Florida Keys National Marine Sanctuary. It lies to the southeast of Key Largo, within the Key Largo Existing Management Area, which is immediately to the east of John Pennekamp Coral Reef State Park. This reef is within a Sanctuary Preservation Area.
The reef was marked by an unmanned reef light for most of the 20th century.
On August 4, 1984, the motor vessel Wellwood, a 122-meter freighter carrying pelletized chicken feed, ran aground on Molasses Reef. The total destruction from the grounding included 5,805 square meters of living corals and injury to 75,000 square meters of reef habitat.
Wikipedia https://en.wikipedia.org/wiki/Molasses_Reef
Coordinates 25°0'37.184" N -80°22'28.776" E