Organ Cave is an unincorporated community in Greenbrier County, West Virginia, United States.

Confederate General Robert E. Lee and his troops held a church service in the main entrance room of the cave during the war.

Remains of the Civil War mining are in an excellent state of preservation and are seen on the commercial tour.

The owner of the cave sent some of the bones (a forearm and a hand with giant claws) to Thomas Jefferson.

Jefferson soon determined that the animal was actually an extinct sloth, not a lion, but the Genus name "Megalonyx" is retained to this day.