Taken on Vesuvius, Italy. You can see steam coming from vents inside the crater.
Vesuvius is an active volcano and may erupt any time in the near future. Over the last few centuries, Vesuvius has erupted at intervals ranging from 18 months to 7½ years, making the current lull the longest in 500 years. Its lack of eruption may merely indicate a build-up of pressure, which may result in a more explosive next eruption, posing a lethal hazard to over 500,000 residents living in the same place that got destroyed in 79 A.D.