For those that have never visited a desert, there is a popular perception that such areas only have miles and miles of flat, featureless terrain. In reality, however, deserts have a huge variety of terrain, ranging from mountains, sand dunes, slot canyons, sunken basins, and a variety of things in between. One of the most interesting things about deserts is that many of them provide evidence of dormant volcanism (such as the Ubehebe Crater), and active volcanism (such as the Mud Pots in the Salton Sea). In the Mojave Desert, there are a number of locations that one can see evidence of dormant volcanism, from the Cinder Cone area within Mojave National Preserve, and the Amboy Crater National Natural Landmark.