Have you ever imagined what life is like hundreds of feet below the surface of the earth? There is no sunlight here, no green plants, and no birds. Descend to the dark zones to learn all about the world of caves. You'll need special equipment, including a helmet with a light, and some experienced companions to join you!
This resource is supported by the Institute of Museum and Library Services under the provisions of the Library Services and Technology Act as administered by State Library of Iowa.