Craters of the Moon National Monument is a strange, largely barren landscape set within a lava field. The best part of the park involves exploring lava tube caves. Before heading into a cave though, make sure you are not wearing any clothes you have previously worn underground (including jackets, shoes, or boots), and check in at the Visitor Center to obtain a free permit. When planning your trip, consider also adding an excursion to Black Magic Slot Canyon, the Shoshone Ice Cave, or tour the Experimental Breeder Reactor (EBR-1)