Volcanoes

Of the 5 most-active volcanoes in the world the only one in the United States is in Hawaii. Kilauea Volcano has been erupting continuously since January 3, 1983. There are links to videos of this volcano here. This site, which offers virtual field trips says,

Unlike most other active volcanoes, Kilauea is approachable. It has been called the "drive-up" volcano because of the ease of access to many of its areas of volcanic activity, especially the summit caldera.

But let it be also said that some people have died.

There is a camera which updates every 5 minutes here.

The photo above is from Flickr.