Today, Portugal's Furnas volcano is a fun tourist attraction. But, a mere 395 years ago, it was the site of the nation's deadliest volcanic eruption. While there is currently magma at 5 kilometers or 3.1 miles below ground underneath a section of this Azores volcano, it is not currently a cause for concern as it has been there for some time. Today's video will discuss this volcano and its geologic history.