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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

140 Lost Sea Rd.
Sweetwater, TN 37874

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Contact Phone Number
Fax Number
Admission Rates
Adults $21.95 Children (4-12) $12.95 children 3 and under free
Dates Closed
Closed Thanksgiving Day
Closed Christmas Day
Hours
Hours Vary see website.
Discounts Offered
  • Senior Citizen Discount
  • Group Discount
  • Military Discount
  • AAA Discount
Payment Methods Accepted
  • Cash
  • Discover
  • Mastercard
  • Visa
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