Caves of Alabama

Alabama has more than 4,200 known caves, according to the Alabama Cave Survey in 2007, up from about 300 known in 1955 [1]. Northeast Alabama holds roughly two-thirds of them and is considered a cave hotspot in the United States. The caves form in karst, where slightly acidic rainwater dissolves soluble bedrock. This entry covers their geology, life, uses and notable examples.

How the caves formed

Many Alabama caves lie in Mississippian limestone deposited about 350 to 320 million years ago, when a shallow sea covered much of the state. Acidic rainwater dissolves the rock, leaving chambers, pockets and chimneys, while deposits called speleothems, such as flowstone, stalagmites and stalactites, grow later. Northeast Alabama belongs to the “TAG” karst region spanning southeastern Tennessee, northern Alabama and northwestern Georgia [1].

Cave life

Alabama ranks third among U.S. states in troglobite (cave-adapted) species. Jackson County has more caves and species than any other Alabama county and more troglobite species than any other county in the continental United States. Common cave animals include crayfish, millipedes, spiders, fish, salamanders and bats. The albino Alabama cavefish, discovered in 1967 and found only in Key Cave in Lauderdale County, has sensory structures instead of functional eyes. The endangered gray bat lives in Key Cave and others, and in 2022 scientists sighted the Shelta Cave crayfish, feared extinct since 1988 [1]. See biodiversity and habitat.

Notable caves

Russell Cave in Jackson County holds about 10,000 years of human history. Rickwood Caverns and Cathedral Caverns are open to the public. Shelta Cave in Huntsville hosted parties and underground boating in the late nineteenth century, and Bangor Cave in Blount County operated as a 1930s Prohibition-era speakeasy [1].

Human uses

Prehistoric peoples and early settlers used caves for shelter, and settlers stored perishables there because the temperature stays cool. Potassium nitrate for early gunpowder was mined from caves before the War of 1812 and during the Civil War, and bat guano was mined for fertilizer. During the Cold War some caves were designated fallout shelters. The National Speleological Society, founded in 1941, moved its headquarters to Huntsville in 1971 [1].

Conservation

Cave ecosystems are fragile, and protecting groundwater is key to preserving them. The National Speleological Society and the Alabama Cave Survey continue to find new caves and advance preservation [1]. For the landforms above them, see Geography of Alabama.

FAQs

How many caves does Alabama have? More than 4,200 known as of 2007.

Where are most of them? Northeast Alabama, which holds about two-thirds.

What is the Alabama cavefish? An albino, eyeless fish found only in Key Cave.

Which county has the most caves? Jackson County.

Sources

1. Encyclopedia of Alabama: Caves of Alabama

Editorially reviewed by Specialty Digest Editorial TeamLast reviewed November 10, 2026Researched and drafted with AI assistanceReport an issue