DeSoto Caverns, Show cave in Childersburg, Alabama, United States.

DeSoto Caverns is a show cave in Childersburg, Alabama, whose main room is just over ten stories high and larger than a football field. Its walls carry dense vertical fluted ridges, and near the lower center-left a smooth white and pale grey flowstone drapes over the darker grooved stone. The cave holds one of the world's largest continuing accumulations of onyx-marble stalagmites and stalactites, and these speleothems are still growing.

A Copena-culture burial site in the cave was found in 1963 by University of Alabama archaeologists, holding five skeletons including a child and a jawbone attributed to a man over seven feet tall; the remains were reburied in 1995. In 1796 Benjamin Hawkins reported on the cave, the first officially recorded cave in the United States. Toward the end of the Civil War the cave was a saltpeter-mining center, and its spring-fed well, leaching trough and a reconstructed vat are on display.

The cave sits a few miles east of the old Coosa capital near present-day Childersburg; the Coosa chiefdom's capital took its name from the canebrake. In 1540 the Coosa Micco welcomed Hernando de Soto at a ceremony near the cave entrance, then de Soto took him hostage and enslaved Coosa people. The Copena culture buried five individuals here, including a child and a man whose jawbone suggests a height over seven feet; the remains were reburied in 1995.

The entrance was enlarged from an earlier 4-foot-high, 8-foot-wide hole in the hillside, so the main room is reached without crawling. Guests may not touch most formations because the speleothems are still actively growing. The tour includes a sound, light and water show that changes with the seasons and holidays.

During Prohibition (1920–1933) an illegal speakeasy and dance hall opened inside the cave. Frequent shootings and fights earned it the nickname "The Bloody Bucket" in the early 1920s, and federal agents eventually shut it down. Ida Mathis's son Allen then bought out the mining partners' interests in the mid-1920s.