When you travel across the United States, you can see many sights made by volcanoes. You know what cone-shaped volcanoes look like. But keep an eye out for many other landmarks.
Some volcanoes build mountains, but only when they are active. When they stop erupting, they start to wear down, or erode. After a long time, only parts of the mountain are left.
Other volcanoes don’t build mountains. Instead, their lava floods the land. It drowns hills and valleys. Sometimes during an eruption, the top of a volcanic cone falls in and a crater forms. A crater is also called a caldera. Craters can be anywhere from hundreds of feet wide to tens of miles across!
Let’s visit some of America’s volcanic landmarks.
