Learn more about The Lost Sea.

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Take a boat ride on the Lost Sea, a unique natural wonder which is listed as “America’s Largest Underground Lake” in the Guinness Book of World Records. Lost Sea has been designated a Registered Natural Landmark by the U.S. Dept. of Interior.

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The Lost Sea, America's Largest Underground Lake
Cascades one of our prettiest formations in the cave
Veil Of Tears Formation
Entrance to the cave
The Lost Sea Glassblower has an amazing display of glass.
Enjoy our gem mine and pan for some awesome gemstones
Try one of our off the beaten path Wild Cave Tours.
The Lost Sea

140 Lost Sea Rd.
Sweetwater, TN 37874

Questions? Please Email
Contact Phone Number
Admission Rates
Adults $19.95 Children (5-12) $10.95 children 4 and under free
Dates Closed
Closed Christmas Day
Hours Vary see website.
Discounts Offered
  • Senior Citizen Discount
  • Group Discount
  • Military Discount
  • AAA Discount