Georgia Nuclear Aircraft Laboratory, Georgia
In the early 1950s, the military and air force were attempting to see if a nuclear-powered airplane was possible. So, they decided to run radiation experiments on various pieces of equipment to see if the radiation would destroy the equipment or imbibe the equipment with dangerous levels of radiation.
The continued radiation testing led the site of this laboratory, Dawson’s Forest, to decay and cease growth, with many trees losing its leaves. The site was shut down in the 1970s, but there are reportedly tunnels that span under the forest.
The entrance to these tunnels has been buried, but this does not stop explorers from searching for them. As the results of the experiments are yet to be declassified, exploring these tunnels could provide a clue to what the government found in their experiments!