The carabinieri of the Naples Provincial Command said the 23-year-old Baltimore man was hiking on an unauthorized trail with three relatives on Saturday morning. Two British tourists were also seen walking on the restricted road.
After the fall, the man reported only a few bruises on his arms, hands and back.
He was treated by an ambulance that arrived at the scene, but did not want to go to the hospital, police said.
There were clear signs of danger and restricted entry warnings on the path, according to the force, which added that the plaintiff would decide whether to proceed with a formal charge against him for invading public territory.
The last eruption of Mount Vesuvius was in 1944. He is still active, but in a state of rest, according to the Vesuvius National Park website.
The national park’s website adds that the highest peak of the mountain reaches 1,277 meters (4,190 feet), while the pit is 450 meters (1,476 feet) in diameter and 300 meters (984 feet) deep.
Vesuvius had been a dormant volcano for centuries before it erupted in 79 AD, burying cities such as Pompeii, Applantis and Stabia under ashes.
Pompeii sank under a 23-foot-deep layer of volcanic debris, protecting the ruins from the harmful effects of weather and climate. Since then it has become a popular tourist destination, as well as a rich place of study for archaeologists.