Welcome to the Key Largo Nike Hercules Missile battery HM-40. This was a missile site holding Hercules missiles in response to the cuban missile crisis in the 1960's. About 5 were built around South Florida. This one (dubbed HM-40) Was abandoned in the late 70's and now is part of the Crocodile lake national refuge.
This area is overseen by Monroe County sheriff and FWC (Florida Fish & Wildlife Commission). FWC Officers frequent the area but we had no unexpected visitors.