Experts believe a Mount Rainier eruption would post a grave threat to millions who live in the southern and eastern sections ...

The snowcapped peak of Mount Rainier, which towers 4.3 kilometers (2.7 miles) above sea level in Washington state, has not produced a significant volcanic eruption in the past 1,000 years.

One of the world’s oldest national parks, Mount Rainier became part ... The Sicily, Italy, volcano is almost constantly in a state of eruption. Get there: From Seattle (95 miles) or Tacoma ...