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Louisville, Kentucky
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The cavern was originally a limestone quarry that was mined from the 1930s to the 1970s, and it spans approximately 100 acres beneath the city of Louisville.
The Louisville Mega Cavern features the world's only fully underground zip line course, offering a unique adventure experience.
During the Cold War, the cavern was designated as a fallout shelter capable of protecting up to 50,000 people in the event of a nuclear attack.
The cavern hosts the Mega Underground Bike Park, which is the largest indoor bike park in the world, featuring over 320,000 square feet of trails and obstacles.
Each year, the Mega Cavern transforms into a winter wonderland with its 'Lights Under Louisville' event, featuring over 3 million lights.
The Louisville Mega Cavern maintains a constant temperature of around 58 degrees Fahrenheit year-round, making it an ideal environment for various activities regardless of the weather outside.
The Mega Cavern is committed to sustainability, recycling over 1 million pounds of materials annually, including metals, plastics, and electronics.
