GeoEye is a company that owns Earth-imaging satellites and provides imagery for commercial and government clients. They have a set of image galleries with imagery of natural and manmade features. Here are a couple images from their volcanoes gallery:
Krakatoa, Indonesia:
Nyiragongo, Congo:
If you’ve used Google Earth, you’ve probably seen GeoEye imagery, as Google has exclusive commercial rights to GeoEye-1 satellite imagery.
Cool stuff.
Grace and Peace