National Caves Association
The National Caves Association's Web site features a detailed interactive map and directory of caves you can visit in the United States. You'll also find an extensive list of links and FAQs related to caves and caving around the world.
Carlsbad Caverns National Park
The National Park Service offers an online guide to Lechuguilla Cave in Carlsbad Caverns National Park, which includes a photo gallery, a list of facts, a teacher's guide, and more.
Find out all you ever wanted to know about extremophiles, from alkaliphiles to xerotolerants and everything in between, at this University of New South Wales microbiology Web site.
The National Speleological Society
Learn more about the different kinds of caves and how they are formed, and find out how to help protect and preserve caves.
Kane Caves Research Project
Discover more about the innovative research at Lower Kane Cave, Wyoming, featured in NOVA's "Mysterious Life of Caves." The site includes a photo gallery of the cave's remarkable microbial mats and links to other sites about sulfide caves.
Lechuguilla: Jewel of The Underground
Second edition edited by Urs Widmer. Allschwil, Switzerland: Caving Publications International, 1998.
This gorgeous coffee-table book, enhanced by articles on Lechuguilla's history, geology, and ecology, offers a pictorial journey through the magnificent underground lakes and chambers of this New Mexico cavern. (To order in the States, call 518-295-7978; elsewhere, write to Speleo Projects, Lettenweg 118, CH-4123 Allschwil, Switzerland.)
Caves: Exploring Hidden Realms
edited by Michael Ray Taylor. Washington, D.C.: National Geographic, 2000.
Caves features stunning color photographs of ice, underwater, and rock caves and a collection of lively essays written by cavers and cave scientists.
Tales From The Underground: A Natural History of Subterranean Life
by David W. Wolfe. Cambridge: Perseus, 2001.
A Cornell University ecologist, Wolfe describes the astonishing array of life underground, from tiny critters like water bears to sizeable troglodytes like mole rats and burrowing owls.
The Surprising Archaea: Discovering Another Domain of Life
by John L. Howland. New York: Oxford University Press, 2000.
Howland presents a lucid and entertaining survey of the Archaea, microbes so different from bacteria that their discoverer, University of Illinois biophysicist Carl Woese, suggested they should form a separate domain on the tree of life, along with Bacteria and Eukarya.