9. Mount Vesuvius In Italy
This is the most famous volcano in history. Mount Vesuvius last erupted in 1944 and another eruption is considered likely in the near future.
Additionally, the are surrounding Mount Vesuvius is heavily populated. Over three million people live within the blast radius. If the volcano erupts, there will be serious consequences.
10. Mauna Loa In Hawaii
This is the largest volcano in the entire world. Mauna Loa has been continually active for hundreds of thousands of years and had a full on eruption in 1984.
While an explosion would be deadly, Mauna Loa’s constant lava flow is the biggest threat.