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Explore the fascinating underground history of Cedar Rapids, Iowa through this 14-minute historical documentary that reveals how forgotten 19th-century beer caves continue to cause modern-day sinkholes. Discover the engineering marvel of brick-lined underground chambers that once stored thousands of beer barrels before refrigeration technology transformed the brewing industry. Learn about the immigrant brewers who built these subterranean vaults, trace the rise and fall of Iowa's beer industry, and understand how Prohibition permanently sealed away this hidden world beneath the city streets. Uncover the construction techniques used to create these caves, examine why they were abandoned, and see what archaeological remnants survive today in Cedar Rapids' underground landscape.
