Lava Beds National Monument is just west of the Wildlife Refuge and has more than 450 lava tube caves, the greatest concentration in North America. In addition, the monument encompasses the main battlefields of the Modoc War of 1872-73 and nearby is the site of the WWII Japanese Internment Camp outside Tulelake, California. The monument also includes Petroglyph Point, one of the largest panels of Native American rock art in the United States. Stop by the wonderful visitor center that has the lanterns and bump hats you'll need to have a great day of exploration.