When you think of the United States, images of sprawling cities and vast landscapes might come to mind, but not the hidden and ever-present geological threat: volcanoes. While you might associate ...

Volcanoes are exciting and seeing molten lava is a thrill. To see active volcanoes, head to a U.S. National Park that preserves volcanoes or parts of volcanoes. At a National Park, visitors can learn ...

Olympus Mons, a shield volcano on Mars, is the largest volcano in the solar system, measuring approximately 370 miles in diameter and 26 kilometers in height. The formation of Olympus Mons and three ...